%0 Journal Article %B Contemporary Clinical Trials %D 2011 %G eng %M 21777702 %P 909-15 %T IMProving Adherence using Combination Therapy (IMPACT): design and protocol of a randomised controlled trial in primary care %V 32 %7 2011/07/23 %@ 1559-2030 (Electronic)1551-7144 (Linking)