Telephone delivered incentives for encouraging adherence to supervised methadone consumption (TIES): Study protocol for a feasibility study for an RCT of clinical and cost effectiv... oleh Nicola Metrebian, Timothy Weaver, Stephen Pilling, Kimberley Goldsmith, Ewan Carr, James Shearer, Kathryn Woolston-Thomas, Basak Tas, Carol-Ann Getty, Charlotte Cooper, Rob van der Waal, Michael Kelleher, Emily Finch, Prun Bijral, David Taylor, Jenny Scott, John Strang