First aid Q & A for the USMLE step 1 / Tao T. Le, Joshua Klein, Anil Shivaram, founding senior editors. - New York : McGrawHill Medical, 2007. - xvi, 629 p. : ill. ; 27 cm. Medicine. Licensure, Medical. ISBN: 9780071481724 RM171.50 0071481729 Index Terms--Genre/Form: Examination Questions.