00430nas a2200181   4500000000100000000000100001008004100002100001400043700001500057700001700072700001400089700001500103700001300118245008500131300001200216490000600228022001400234       2017                            d1 aF. Nissen1 aD. Morales1 aH. Mullerova1 aL. Smeeth1 aI. Douglas1 aJ. Quint00aValidation of asthma recording in the Clinical Practice Research Datalink (CPRD)  ae0174740 v7  a2044-6055