00440nas a2200169   4500000000100000000000100001008004100002100001500043700001500058700001500073700001300088700001300101245010500114300001200219490000700231022003200238       2004                            d1 aM. Frisher1 aJ. Collins1 aD. Millson1 aI. Crome1 aP. Croft00aPrevalence of comorbid psychiatric illness and substance misuse in primary care in England and Wales  a1036-410 v58  a0143-005X (Print) 0143-005x