▁words : ▁ ▁( p ais ▁" child ") ▁and ▁ ▁( iat ros ▁" do ctor , ▁he aler "). ▁Ped iat r icians ▁work ▁both ▁in ▁hosp it als , ▁particularly ▁those ▁working ▁in ▁its ▁sub special ties ▁such ▁as ▁ne on at ology , ▁and ▁as ▁out pat ient ▁primary ▁care ▁phys icians . ▁ ▁History ▁ ▁Al ready ▁Hi pp ocr ates , ▁Arist ot le , ▁C els us , ▁Sor anus , ▁and ▁Gal en ▁understood ▁the ▁differences ▁in ▁growing ▁and ▁m aturing ▁organ isms ▁that ▁necess itated ▁different ▁treatment : ▁ ▁(" In ▁general , ▁boys ▁should ▁not ▁be ▁treated ▁in ▁the ▁same ▁way ▁as ▁men "). ▁ ▁Some ▁of ▁the ▁oldest ▁traces ▁of ▁ped iat rics ▁can ▁be ▁discovered ▁in ▁An cient ▁India ▁where ▁children ' s ▁do ctors ▁were ▁called ▁k um ara ▁b hr ty a . ▁Sus hr uta ▁Sam h ita ▁an ▁ay ur ved ic ▁text , ▁composed ▁during ▁the ▁sixth ▁century ▁BC ▁contains ▁the ▁text ▁about ▁ped iat rics . ▁Another ▁ay ur ved ic ▁text ▁from ▁this ▁period ▁is ▁K ash y apa ▁Sam h ita . ▁ ▁A ▁second ▁century ▁AD ▁manuscript ▁by ▁the ▁Greek ▁phys ician ▁and ▁gy ne colog ist ▁Sor anus ▁of ▁E ph es us ▁de alt ▁with ▁ne on atal ▁ped iat rics . ▁By z antine ▁phys icians ▁O rib as ius , ▁A ë ti us ▁of ▁Am ida , ▁Alexander ▁Tr al li anus , ▁and ▁Paul us ▁A