AdvertisementShortages Lead Doctors To Ration Critical DrugsOctober 03, 2011Richard KnoxfacebookEmailLaura Zakhar connects her son, Kevin, 15, to the "feedbag" that contains his nutrition. Lately, Zakhar has had trouble getting the calcium solution Kevin needs, in part because hospitals have been reserving limited supplies for patients who need it even more desperately than he does. (Elizabeth Larkin for NPR)