▁ ▁before ▁working ▁for ▁a ▁year ▁in ▁the ▁USA , ▁working ▁with ▁Pa ed iat ric ▁Ne ph ro log ist ▁Mal col m ▁H oll iday , ▁at ▁the ▁University ▁of ▁California , ▁San ▁Francisco ▁studying ▁growth ▁in ▁r ats ▁with ▁chron ic ▁ren al ▁failure , ▁before ▁returning ▁in ▁ 1 9 7 3 ▁to ▁continue ▁working ▁at ▁Gu ys ▁under ▁Stewart ▁Camer on . ▁ ▁From ▁ 1 9 8 5 ▁to ▁ 1 9 8 8 , ▁Ch ant ler ▁was ▁the ▁General ▁Manager ▁of ▁Guy ' s ▁Hospital . ▁From ▁ 1 9 9 2 ▁to ▁ 1 9 9 8 , ▁Ch ant ler ▁was ▁the ▁principal ▁of ▁the ▁United ▁Medical ▁and ▁D ental ▁School s ▁of ▁Guy ' s ▁and ▁St ▁Thomas ' ▁H osp it als . ▁From ▁ 1 9 9 7 ▁to ▁ 2 0 0 0 , ▁Ch ant ler ▁was ▁the ▁pro - vice ▁ch an cell or ▁of ▁the ▁University ▁of ▁London . ▁From ▁ 2 0 0 1 ▁to ▁ 2 0 0 8 , ▁Ch ant ler ▁was ▁Chair man ▁of ▁the ▁Great ▁Or mond ▁Street ▁Hospital ▁for ▁S ick ▁Children . ▁Ch ant ler ▁was ▁Cons ult ant ▁Pa ed iat ric ian ▁at ▁Guy ' s ▁Hospital ▁from ▁ 1 9 7 1 ▁to ▁ 2 0 0 0 , ▁and ▁Fund ▁Professor ▁of ▁Pa ed iat ric ▁Ne ph ro log y ▁at ▁London ▁University , ▁ 1 9 9 0 – 2 0 0