C. Leng

Human recombinant erythropoietin and the incidence of retinopathy of prematurity: a multiple regression model.

N. Daher, Anthony Liu, E. Fayard, 2006, Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus.

Lead poisoning from contaminated opium.

B. Chia, Y. K. Lee, M. Yap, 1973, British medical journal.