BMJ Open, Vol 11, Iss 6 (2021) Clout, M J, Blazeby, J M, Rogers, C A, Reeves, B C, Lazaroo, M, Avery, K N L, Blencowe, N S, Vohra, R, Jenning, N, Hollingworth, W, Thorn, J C, Jepson, M J, Collingwood, J M, Guthrie, A, Booth, E, Pathak, S, Beckingham, I, Culliford, L A, Griffiths, E, Albazaz, R & Toogood, G 2021, ' Randomised controlled trial to establish the clinical and cost-effectiveness of expectant management versus preoperative imaging with magnetic resonance cholangiopancreatography in patients with symptomatic gallbladder disease undergoing laparoscopic cholecystectomy at low or moderate risk of common bile duct stones (The Sunflower Study) : a study protocol ', BMJ Open, vol. 11, no. 6, e044281, pp. e044281 . https://doi.org/10.1136/bmjopen-2020-044281 University of Bristol-PURE Clout, M J, Blazeby, J M, Rogers, C A, Reeves, B C, Lazaroo, M, Avery, K N L, Blencowe, N S, Vohra, R, Jenning, N, Hollingworth, W, Thorn, J C, Jepson, M J, Collingwood, J M, Guthrie, A, Booth, E, Pathak, S, Beckingham, I, Culliford, L A, Griffiths, E, Albazaz, R & Toogood, G 2021, ' Randomised controlled trial to establish the clinical and cost-effectiveness of expectant management versus preoperative imaging with magnetic resonance cholangiopancreatography in patients with symptomatic gallbladder disease undergoing laparoscopic cholecystectomy at low or moderate risk of common bile duct stones (The Sunflower Study) : a study protocol ', BMJ Open, vol. 11, no. 6, e044281, pp. e044281 . https://doi.org/10.1136/bmjopen-2020-044281, https://doi.org/10.1136/bmjopen-2020-044281 BMJ Open