Complex sentence: It remained a condition generally treated by surgeons, with exploration of the bile duct and excision of gallstones, until the ascendancy of ERCP, introduced in 1968, which is generally performed by internal medicine or gastroenterology specialists.
Split into simpler sentences: It remained a condition generally treated by surgeons, with exploration of the bile duct and excision of gallstones, until the ascendancy of ERCP in 1968. ERCP is generally performed by internal medicine or gastroenterology specialists.