2 , ▁Park ▁wrote ▁his ▁first ▁ped iat rics ▁paper ▁while ▁studying ▁path ology ▁at ▁W elf are ▁Island . ▁During ▁that ▁summer , ▁Park ▁also ▁went ▁to ▁Mar burg , ▁Germany ▁to ▁study ▁under ▁Dr . ▁Schmidt , ▁the ▁world ' s ▁leading ▁expert ▁in ▁r ick ets ▁at ▁the ▁time . ▁While ▁abroad , ▁Park ▁was ▁offered ▁a ▁position ▁by ▁Dr . ▁How land ▁to ▁join ▁his ▁first ▁ped iat ric ▁staff ▁at ▁Joh ns ▁Hop kins ▁Hospital . ▁Although ▁Park ▁initially ▁decl ined ▁because ▁he ▁was ▁working ▁with ▁Dr . ▁Jan ew ay ▁at ▁that ▁time ▁and ▁felt ▁obliged ▁to ▁stay ▁in ▁the ▁position , ▁he ▁later ▁joined ▁the ▁small ▁staff ▁in ▁the ▁effort ▁of ▁creating ▁a ▁new ▁full - time ▁department ▁of ▁Ped iat rics ▁at ▁Joh ns ▁Hop kins . ▁ ▁World ▁War ▁I ▁ ▁When ▁World ▁War ▁I ▁broke ▁out ▁in ▁ 1 9 1 4 , ▁Red ▁Cross ▁sent ▁Park ▁to ▁Le ▁Hav re , ▁France ▁to ▁run ▁an ▁or phan age ▁for ▁Belg ian ▁children . ▁With ▁a ▁conf ined ▁staff ▁of ▁only ▁three ▁do ctors , ▁a ▁nur se ▁and ▁an ▁executive ▁secretary , ▁Park ▁util ized ▁very ▁limited ▁resources ▁to ▁establish ▁a ▁clin ic ▁and ▁a ▁small ▁hospital ▁in ▁the ▁local ▁neighborhood . ▁During ▁this ▁time , ▁Park ▁witness ed ▁first - hand ▁the ▁effects ▁of ▁pover ty ▁and ▁mal nut r ition ▁on ▁disease , ▁which ▁is ▁why ▁he ▁later ▁decided ▁to ▁h ire ▁Ruth ▁Washington ▁in ▁the ▁summer ▁of ▁ 1