male guinea-pigs given choline by intraperitoneal injection , 40 doses of 50 mg of choline chloride , 5 days per week for 8 weeks , developed lung lesions consisting of peripheral nodules of small cells , neoplastic bronchiolar epithelium , carcinomatous lesions and changes in the pleural surface by the end of the experiment ( 680 days ) .
C0008405
choline
C0008409
choline chloride