00398nas a2200133   4500000000100000000000100001008004100002100001500043700001500058245014100073300001100214490000700225022003200232       1994                            d1 aS. Roberts1 aD. Bateman00aThe use of nitrates, calcium channel blockers and ACE inhibitors in primary care in the Northern Region: a pharmacoepidemiological study  a489-970 v38  a0306-5251 (Print) 0306-5251