RT Journal Article SR Electronic T1 Cystinuria and Cystine Calculi JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 80 OP 88 VO 17 IS 2 A1 Arthur G. Michels A1 William J. Engel YR 1950 UL http://www.ccjm.org/content/17/2/80.abstract AB