Bangladesh 20 arsenicosis patients with melanosis and leucomelanosis 20 controls with As in drinking water 20 unexposed controls
Secretions from chest, back, and abdomen collected for 24 h, on gauze pads (8-fold; 2 × 3 inches) attached to fitted T-shirt
As secretion severalfold greater for As-exposed groups No significant difference between patients and As-exposed controls 2 zinc atoms excreted per As atom Vitamin E excreted with As