लेखक: P.L. Chambers

The first oral contraceptive became available in 1960 and since then these sub- stances, which have been used by millions of women, have probably been the most widely studied group of drugs in medica …

Nervous system is in the most cases a likely target for the untoward effects of chemicals. The harmful consequences affect primarily the individual but may also considerably strain the whole society. …

Many chemotherapeutic agents introduced for use in humans are carcinogenic in laboratory animals (Conklin et al. 1965; Shimkin et al. 1966; Griswold et al. 1968; Harris 1976). However, initially thei …

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