Defining Feasibility and Pilot Studies in Preparation for Randomised Controlled Trials: Development of a Conceptual Framework Eldridge, Sandra M. ; Lancaster, Gillian A. ; Campbell, Michael J. ; Thabane, Lehana ; Hopewell, Sally ; Coleman, Claire L. ; Bond, Christine M. Abstract Publication: PLoS ONE Pub Date: March 2016 DOI: 10.1371/journal.pone.0150205 Bibcode: 2016PLoSO..1150205E