passages.id: 1149
passages.type: sentence
passages.text: A total of 57 consecutive patients with primary ureteropelvic junction obstruction were randomized to undergo 7/14Fr internal endopyelotomy stent placement for 2 ( group 1 ) and 4 ( group 2 ) weeks .
entities.id: 1150
entities.type: intervention
entities.text: 7/14Fr internal endopyelotomy stent placement
entities.id: 1151
entities.type: participant
entities.text: A total of 57 consecutive patients with primary ureteropelvic junction obstruction