Quantitative genetic tools for insecticide resistance risk assessment: estimating the heritability of resistance.

Quantitative genetic studies of resistance can provide estimates of genetic parameters not available with other types of genetic analyses. Three methods are discussed for estimating the amount of additive genetic variation in resistance to individual insecticides and subsequent estimation of the heritability (h2) of resistance. Sibling analysis and offspring-parent regression permit direct estimates of h2 by comparing the resistance phenotypes of individuals of known relatedness.

Clinical trial of hemodialysis in chronic schizophrenia.

The hemodialysis program was carried out in four male chronic schizophrenic patients hospitalized 3--12 months in the Psychiatric Clinic, Medical University, Wroclaw. The diagnosis was made independently by three psychiatrists. The disease lasted 5 to 26 years.