Lewis David B, Gern James E, Hill Harry R, Friedlander Samuel L, La Pine Timothy R, Lemanske Robert F, Stiehm E Richard
Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA, USA.
Curr Probl Pediatr Adolesc Health Care. 2006 May-Jun;36(5):189-204. doi: 10.1016/j.cppeds.2005.11.001.