P1- HIGH VIRAL SUPPRESSION AND IMPROVED SAFETY PROFILE OF TENOFOVIR ALAFENAMIDE RELATIVE TO TENOFOVIR DISOPROXIL FUMARATE IN CHRONIC HEPATITIS B PATIENTS TREATED FOR 5 YEARS Wai Kay Seto; Ting-Tsung Chang; Abhijit Chowdhry; Chi-Yi Chen; Mustafa Kemal Celen; Xiaoli Ma; Mang Ma; Ajay Duseja; Ki Tae Yoon; Wan Cheng Chow; Leland Yee; Gregor Weber; Ms Jin Youn; John F. Flaherty; Anuj Gaggar; Bing Gao; Gregory Camus; Eric Bassetti; Jae Seok Hwang; Tetshuro Inokuma; Young- Suk Lin; Edward J. Gane;