OC.05.3 HISTOMORPHOLOGICAL AND MOLECULAR CHARACTERIZATION OF PARKINSON'S DISEASE PATIENTS WITH CONSTIPATION: A PILOT STUDY. (25th March 2019) - Fani, B.; Bellini, G.; Fornai, M.; Ippolito, C.; Segnani, C.; Frosini, D.; Pellegrini, C.; Benvenuti, L.; Gambaccini, D.; Bernardini, N.; Ceravolo, R.; Blandizzi, C.; et al.