PRS66 PSYCHOMETRIC EVALUATION OF THE C-PATH PRO CONSORTIUM'S ASTHMA DAYTIME AND NIGHTTIME SYMPTOMS DIARIES (ADSD AND ANSD) IN THE 54-WEEK, RANDOMIZED, PLACEBO-CONTROLLED, DOUBLE-BLINDED PHASE IIB STUDY OF MSTT1041A IN PATIENTS WITH UNCONTROLLED, SEVERE ASTHMA (NCT02918019)