WCN24-1978 COMPARISON OF SPOT AND 24-HOUR URINE OSMOLALITY MEASUREMENTS IN AUTOSOMAL DOMINANT POLYCYSTIC KIDNEY DISEASE - Ayub Akbari; Sriram Sriperumbuduri; Shreepryia Mangalgi; Gregory Hundemer; Manish Sood; Mohan Biyani; Pierre Brown (Kidney International Reports)