00422nas a2200181   4500000000100000000000100001008004100002100001700043700001200060700001500072700001300087700001400100700001400114245008100128300001000209490000700219022001400226       2016                            d1 aM. Alexander1 aY. Ding1 aN. Foskett1 aH. Petri1 aC. Wandel1 aO. Khwaja00aPopulation prevalence of Down\textquoterights syndrome in the United Kingdom  a874-80 v60  a0964-2633