Hypercalcaemia from non-prescription vitamin A.

1. Shalev H, Romanovsky I, Knoers NV et al. Bladder function impairment in aquaporin-2 defective nephrogenic diabetes insipidus. Nephrol Dial Transplant 2004; 19: 608–613 2. Ramsey EW, Morrin PA, Bruce AW. Nephrogenic diabetes insipidus associated with massive hydronephrosis and bladder neck obstruction. J Urol 1974; 111: 225–228 3. Tank ES, Alexander SR, Craven RM. Polyuric megalocystis. J Urol 1980; 124: 692–694 4. Eika B, Levin RM, Longhurst PA. Comparison of urinary bladder function in rats with hereditary diabetes insipidus, streptozotocin-induced diabetes mellitus, and nondiabetic osmotic diuresis. J Urol 1994; 151: 496–502 5. Zerin JM, Chen E, Ritchey ML et al. Bladder capacity as measured at voiding cystourethrography in children: relationship to toilet training and frequency of micturition. Radiology 1993; 187: 803–806