0 1 7 : ▁Z er ena , ▁first ▁made ▁for ▁iPhone ® ▁hearing ▁instrument ▁with ▁DE CS ™ ▁technology ▁ ▁External ▁links ▁▁▁▁▁ ▁William ▁Dem ant ▁ ▁References ▁▁ ▁Category : H ear ing ▁aid ▁manufact ur ers ▁Category : Med ical ▁technology ▁companies ▁of ▁Switzerland ▁Category : Sw iss ▁br ands <0x0A> </s> ▁Cry stal ▁L . ▁Mack all ▁( born ▁August ▁ 2 1 , ▁ 1 9 6 0 ) ▁is ▁an ▁American ▁phys ician ▁and ▁imm un ologist .   ▁She ▁is ▁currently ▁the ▁Ernest ▁and ▁Am elia ▁Gal lo ▁Family ▁Professor ▁of ▁Ped iat rics ▁and ▁Medicine ▁at ▁Stan ford ▁University . ▁She ▁is ▁the ▁found ing ▁director ▁of ▁the ▁Stan ford ▁Center ▁for ▁Can cer ▁Cell ▁Ther apy . ▁ ▁Education ▁and ▁early ▁career ▁ ▁Mack all ▁grew ▁up ▁in ▁East ▁Palest ine , ▁Ohio ▁in ▁a ▁working ▁class ▁family ; ▁her ▁father ▁was ▁a ▁steel worker . ▁She ▁received ▁her ▁medical ▁training ▁through ▁a ▁six ▁year ▁B S / MD ▁program , ▁ear ning ▁her ▁b ach elor ' s ▁degree ▁at ▁the ▁University ▁of ▁Ak ron ▁and ▁graduated ▁sum ma ▁cum ▁la ude . ▁She ▁completed ▁her ▁medical ▁education ▁at ▁N ortheast ▁Ohio ▁Medical ▁University , ▁ear ning ▁her ▁Doctor ▁of ▁Medicine ▁in ▁ 1 9 8 4 . ▁She ▁was ▁a ▁member ▁of ▁the ▁Al pha ▁Om ega ▁Al pha ▁honour ▁society . ▁Mack all ▁completed ▁an ▁In ternal ▁Medicine ▁and ▁Ped iat rics ▁Res iden cy ▁at ▁Cleveland ▁C lin ic ▁Ak