* In utero exposure to the anticoagulant coumadin has been associated with hypoplasia of the nasal cartilage, chondrodysplasias, and atrophy of the optic nerves (Warkany 1976).
Exposure to ETS during infancy has been associated with an increased risk of sudden infant death independent of low birth weight or prematurity (Klonoff-Cohen et al.
Daily fluctuations in P[M.sub.10] have been associated with increased emergency room visits for childhood asthma (Rennick and Jarman 1992; Schwartz et al.
Higher maternal body mass index before pregnancy has been associated with a lower risk of having a small-for-gestational-age infant and an increased risk of late fetal death and NTDs (Cnattingius et al.
Excessive levels of micronutrients have also been associated with NTDs (e.g., vitamin A) (Rothman et al.
Inflammatory reactions--including eye irritation, respiratory infections, wheeze, bronchitis, and asthma--in workers in water-damaged or "moldy" buildings have been associated
with the presence of high numbers of microorganisms (8).
azarae, the putative reservoir of the Pergamino genotype, which has not yet been associated
with human disease.
Indeed male murid rodents may be more likely to have scars or wounds (indicators of aggressive encounters) than female rodents (19,21); the presence of scars has been associated with increased prevalence of infection for hantaviruses (12;19; Calisher et al., this issue, pp.
Recent increases in reservoir populations have been associated with increased numbers of HPS cases in the southwestern United States.