‘Recruitment, recruitment, recruitment’ – the need for more focus on retention: a qualitative study of five trials
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C. Gamble | M. Clarke | Anna Kearney | J. Blazeby | A. Shaw | J. Lane | Clare Clement | A. Daykin
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C. Gamble | M. Clarke | Anna Kearney | J. Blazeby | A. Shaw | J. Lane | Clare Clement | A. Daykin