Early intervention for chronic obstructive pulmonary disease by practice nurse and GP teams: a cluster randomized trial

Nicholas A Zwar, Jeremy M Bunker, Helen K Reddel, Sarah M Dennis, Sandy Middleton, Onno CP van Schayck, Alan J Crockett, Iqbal Hasan, Oshana Hermiz, Sanjyot Vagholkar, Wei Xuan, Guy B Marks