egin eta ▁contributed ▁to ▁the ▁field . ▁The ▁By z ant ines ▁also ▁built ▁bre ph ot ro phia ▁( cr ê ches ). ▁Islam ic ▁writers ▁served ▁as ▁a ▁bridge ▁for ▁Gre co - R oman ▁and ▁By z antine ▁medicine ▁and ▁added ▁ideas ▁of ▁their ▁own , ▁especially ▁Hal y ▁Abb as , ▁Ser ap ion , ▁Av ic en na , ▁and ▁A ver ro es . ▁The ▁Pers ian ▁phil os opher ▁and ▁phys ician ▁al - R azi ▁( 8 6 5 – 9 2 5 ) ▁published ▁a ▁mon ograph ▁on ▁ped iat rics ▁titled ▁D ise ases ▁in ▁Children ▁as ▁well ▁as ▁the ▁first ▁definite ▁description ▁of ▁small po x ▁as ▁a ▁clin ical ▁entity . ▁Also ▁among ▁the ▁first ▁books ▁about ▁ped iat rics ▁was ▁Lib ell us ▁[ Op us cul um ] ▁de ▁a eg rit ud in ibus ▁et ▁rem edi is ▁infant ium ▁ 1 4 7 2 ▁(" L ittle ▁Book ▁on ▁Children ▁D ise ases ▁and ▁Tre at ment "), ▁by ▁the ▁Italian ▁ped iat ric ian ▁Paolo ▁Bag ell ardo . ▁In ▁sequence ▁came ▁Bar th ol om ä us ▁Met ling er ' s ▁Ein ▁Regiment ▁der ▁Jung erk inder ▁ 1 4 7 3 , ▁Corn el ius ▁Ro el ans ▁( 1 4 5 0 – 1 5 2 5 ) ▁no ▁title ▁Buch lein , ▁or ▁Latin ▁comp end ium , ▁ 1 4 8 3 , ▁and ▁Heinrich ▁von ▁Lou ffen burg ▁(