After her death, he carried out research showing that there were only two fatal cases in the world, both in the US, directly related to the drug. (BNCI)
SAVE also carried out research in individual historic towns, in some cases professionally, in others with the help of local civic societies. (BNCI)
In both of these areas the investigator has carried out research previously, and consequently interpreting newly available material is not so difficult. (BNCI)