BMJ Open, Vol 11, Iss 4 (2021) Metryka, A, Cuniffe, C, Evans, H J, Gavlak, J G, Hudson, N, Kirby, N, Lakhanpaul, M, Lin, Y, Murray, C, Rajai, A, Robson, H, Schilder, A, Walsh, T & Bruce, I 2021, ' Study protocol for randomised clinical trial comparing the effectiveness of side-lying sleep positioning to back-lying at reducing oxygen desaturation resulting from obstructive sleep apnoea in infants with cleft palate (SLUMBRS2) ', BMJ Open, vol. 11, no. 4, e049290 . https://doi.org/10.1136/bmjopen-2021-049290 BMJ Open