21.   In subsequent weeks, tissue samples were examined in London and toxicology tests were conducted at a forensic center in Toronto.

22.   In the subsequent weeks, tissue samples were examined in London and toxicology tests were conducted at a forensic center in Toronto.

23.   She will examine blood samples from the herbal-treated patients to find out whether the herbs somehow prevent the virus from replicating.

24.   Scientists then examine samples of infected animals and trace the genetic lineage in hopes of finding the source of the infection.

25.   The diplomat tested positive for alcohol, and coroners were examining tissue samples for traces of the drug, Espina said.

26.   WHO will have the vaccine samples tested and examine autopsy samples, he said.

27.   They also examined samples from the Tahiti lagoon, including fish sold at market.

28.   Researchers are examining samples taken from school kitchens, he said.

29.   Royal Canadian Mounted Police spokeswoman Cate Galliford said Thursday the specialists are carefully examining soil samples being carried on a conveyor belt that may be of interest to investigators.