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You searched for: Author/Creator Frey Martin author non-byline.

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1. Large-scale international validation of the ADO index in subjects with COPD: an individual subject data analysis of 10 cohorts. Issue 6 (12th December 2012)

2. Physical activity is increased by a 12-week semiautomated telecoaching programme in patients with COPD: a multicentre randomised controlled trial. Issue 5 (30th January 2017)