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

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 engagements took place outside the town and the Romans were eventually victorious.

Several of the extinct Baltic languages have a limited or nonexistent written record, their existence being known only from the records of ancient historians and personal or place names.

Several other sports may have taken place here, such as lawn bowls, croquet and possibly a version of the Aztec game called ' tlachtli ' ( scoring a ball through a hoop using your hips ).

" Several delegates to the Congress were quite specific in the criticism, one of them accusing Lenin and his associates of making the Ukrainian Soviet Socialist Republic a place of exile for opponents.

Several of the levels take place near the North Pole.

Several annual music festivals take place in Davenport, including the Mississippi Valley Blues Festival, The Mississippi Valley Fair, and the Bix Beiderbecke Memorial Jazz Festival.

* Several stories written by the Danish author Karen Blixen ( or Isak Dinesen ) take place in Helsingør, including " The Supper at Elsinore " in her first published volume of stories, Seven Gothic Tales.

Several of these methods may be directly extended to give definitions of e < sup > z </ sup > for complex values of z simply by substituting z in place of x and using the complex algebraic operations.

Several incidents took place during the Spanish Civil War which affected Gibraltar.

Several important institutional changes took place in this period, such as free and mandatory schooling introduced 1842 ( as first country in the world ), the abolishment of a previous national monopoly on trade in handicrafts in 1846, and a stock company law in 1848.

Several of the units were later used by Mattel Electronics engineers when it was discovered that, with a few minor modifications, a Keyboard Component could be used as an Intellivision software-development system in place of the original hand-built development boards.

Several episodes take place on Mars.

Several episodes take place in the vicinity of Mars, known as " Mars Federation.

* Several stories of the DC Comics character Martian Manhunter take place on Mars, and the Manhunter is a Martian.

Several individual competitions take place under the umbrella of the tournament.

Several requirements are in place for the amputation of hands, they are:

Several other significant changes took place due to the crisis: mankind discovered it could now tap into ultraplanar energies that were seen as magical forces, the stars were gone from the sky, dimensional nexi were uncovered and pacts with " demons " ( inhabitants of dimensions near in n-dimensional space to Tékumel's pocket dimension ) were made and a complex pantheon of " Gods " ( powerful extra-dimensional or multi-dimensional alien beings ) discovered.

Several place names in Iceland, Greenland and Norway may originate from walrus sites ; Hvalfjord, Hvallatrar and Hvalsnes to name some, all being typical walrus breeding grounds.

Several months later he was still in charge of the pupils, the sons of Douglas and Cockburn, who wearied of moving from place to place while being pursued.

Several British and French operations took place beyond Flanders during the 3rd Ypres campaign, intended to assist Allied operations at Ypres, by obstructing the flow of munitions and reinforcements to the German Fourth Army in Belgium and to exploit opportunities created by the German need to economise elsewhere.

Several centuries later Ionia was the place where western philosophy began and was the homeland of Thales, Anaximander and Anaximenes. They were natural-philosophers of the Ionian school of philosophy and tried to explain the phenomena according to no-supernatural laws. They also searched a simple material-form behind the appearances of things ( origin ) and this conception had a great influence on the early archaic art in Greece.

Several million successful jumps have taken place since 1980.

Several anti – death penalty demonstrations took place in front of the Colosseum in 2000.