The Harriet Lane handbook :  a manual for pediatric house officers /  the Harriet Lane Service, Children's Medical and Surgical Center of the Johns Hopkins Hospital ; editors, Jamie Flerlage, Branden Engorn.   - Twentieth edition.   - Philadelphia, PA :  Saunders / Elsevier,  [2015]   - xv, 1132 pages :  illustrations (some color) ;  19 cm   - Mobile medicine series .