Several epidemiological studies from different countries have reported widely varying prevalence rates for chronic pain, ranging from 12-80 % of the population.

Several clinical and epidemiological studies conducted in the United States and in the United Kingdom have investigated the occurrence of MCS in military personnel deployed to the Persian Gulf during the 1990s.

Several epidemiological studies have revealed that people who consume nuts regularly are less likely to suffer from coronary heart disease ( CHD ).

Several different epidemiological studies indicate antibiotic resistance is increasing in clinical isolates.

Several epidemiological studies suggest that people with high calcium intake have a reduced risk of colorectal cancer.

Several characteristics were considered from an epidemiological perspective as being correlated with the condition.

Several studies have shown an increased rate of cancer mortality for workers exposed to 2, 4, 5-T.

Several studies have tried to reconstruct the phylogeny of the genus.

Several studies published since 1990 indicate that cooking meat at high temperature creates heterocyclic amines ( HCAs ), which are thought to increase cancer risk in humans.

Several brain imaging techniques, such as EEG and fMRI, have been used for physical measures of brain activity in these studies.

Several in vitro studies indicated that high concentrations of chromium ( III ) in the cell can lead to DNA damage.

Several in-depth studies of salamander genera in fossil beds in Montana show that six of seven genera were unchanged after the event.

Several of these follow-up studies, which involved viewing in group settings, reported some limited success.

Several studies have specifically addressed Duesberg's claim that recreational drug abuse or sexual promiscuity were responsible for the manifestations of AIDS.

Several clinical and experimental data have implicated the failure of blood – brain barrier ( BBB ) function in triggering chronic or acute seizures, some studies implicate the interactions between a common blood protein — albumin and astrocytes.

Several other studies have also found lasting cognitive gains.

Several demographic studies, including those by social work researcher Athena Kolbe have shed light on the current status of urban residents.

Several studies have suggested that hedge funds are sufficiently diversifying to merit inclusion in investor portfolios, but this is disputed for example by Mark Kritzman who performed a mean-variance optimization calculation on an opportunity set that consisted of a stock index fund, a bond index fund, and ten hypothetical hedge funds.

Several studies have discovered that subjects who received no jury instructions comprehended the law better than subjects who received pattern instructions.

Several researchers include the island of Cyprus in Levantine studies, including the Council for British Research in the Levant, the UCLA Near Eastern Languages and Cultures department, and the UCL Institute of Archaeology, the last of which has dated the connection between Cyprus and mainland Levant to the early Iron Age.

Several clinical studies have shown that combined ECPs containing ethinyl estradiol and levonorgestrel can inhibit or delay ovulation .< sup > 107 – 110 </ sup ></ ref >

Several regression studies with David Meiselman during the 1960s suggested the primacy of the money supply over investment and government spending in determining consumption and output.

Several studies place the nucleariids as a sister group to the fungi.

Several detailed studies using various methods to measure growth curves among known specimens have demonstrated that there is actually only one valid Pterodactylus species, P. antiquus.

Several studies ( Alfredo Torero or Rodolfo Cerrón Palomino ) show that the oldest form of Quechua appeared in Cajamarquilla, Lima.

Several police organizations condemned this study and suggested more studies like this would make them hesitant to pull over visible minorities.

Several sources claim that during his studies he was more interested in religion than joining the military.

Several neuroimaging studies have emerged in order to identify areas associated with stuttering.

Several studies show that between 50 % and 73 % of women who have used this type of condoms during intercourse find them as or more comfortable than male condoms.

Several official design studies were done, but most were basically smaller versions of the existing Shuttle concept.

Several years of her life have been spent in the homeland, and she had written to friends to alert them of our coming.

Several years ago I was his pastor.

Several years ago headlines were made by a small radio transmitter capsule which could be swallowed by the patient and which would then radio internal pressure data to external receivers.

Several years ago she married a Houston business man, Robert Graham.

Several additional candidates for written ASL have appeared in over the years, including Sutton SignWriting, Sign Script, ASL-phabet, and Si5s.

Several years later, Barnabas and Paul set out on a mission ( 13-14 ) to further spread Christianity, particularly among the Gentiles.

Several memorials to his heroic deed have been erected over the years, against great opposition from the citizenry: in the Ludwigskirche, in the Gymnasium Carolinum and at No 6 Kronenstrasse.

Several leagues, seeing the writing on the wall, eventually joined the NA, which grew in size over the next several years.

Several years later, Purcell would give the Herald a suburban presence it never had by purchasing the money-losing Community Newspaper Company from Fidelity Investments.

Several years ago, the president of the Regional Council, Jean-Yves Le Drian wanted the number to be 20, 000 by 2010, though this has not been accomplished.

Several publishers, including Grand River Books, Potomac Books ( formerly known as Brassey's Inc .), and Skyhorse Publishing have re-published the Factbook in recent years.

Several years may be noted if the work has gone through substantial revisions.

Several years after his death, a street on a new housing development in Tividale, West Midlands, was named Attlee Close in his memory.

Several types of military bridging vehicles have existed through the years.

Several years later, Henry IV died in a deep gloom as had Gregory.

Several different control strategies have been devised in the past years.

Several scholars have explored the so-called " golden age " of the Maritimes in the years just before Confederation.

Several years later he emigrated to Ohio and became an American citizen in 1944.

Several years later, rumor tells Deianira that she has a rival for the love of Heracles.

Several years of bad harvests and an inadequate transportation system had caused rising food prices, hunger, and malnutrition ; the country was further destabilized by the lower classes ' increased feeling that the royal court was isolated from, and indifferent to, their hardships.

" Several years after Liébeault's death in 1904, Coué founded what became known as the New Nancy School, a loose collaboration of practitioners who taught and promoted his views.

Several years later, in 1661, the local government alleged that a plot was being hatched by an alliance of Blacks and Irish, one which involved cutting the throats of all the English.

Several mathematicians, including Maclaurin and d ' Alembert, attempted to prove the soundness of using limits, but it would be 150 years later, through the work of Augustin Louis Cauchy and Karl Weierstrass, where a means was finally found to avoid mere " notions " of infinitely small quantities, that the foundations of differential and integral calculus were made firm.

Several films followed in the next couple of years, including two 15 minute shorts that are still shown regularly in Norway today, Veslefrikk med Fela ( Little Freddy and his Fiddle ), based on a Norwegian folk tale, and Karius og Baktus, a story by Thorbjørn Egner of two little trolls, representing Caries and Bacterium, living in a boy's teeth.

Several years passed before he finally found a willing teacher.