PMC:4143611 / 5780-6106 JSONTXT

{"project":"2_test","denotations":[{"id":"24980037-23393167-63233412","span":{"begin":199,"end":201},"obj":"23393167"},{"id":"24980037-23242860-63233413","span":{"begin":203,"end":205},"obj":"23242860"},{"id":"24980037-11380492-63233414","span":{"begin":229,"end":231},"obj":"11380492"},{"id":"24980037-22278423-63233415","span":{"begin":233,"end":235},"obj":"22278423"},{"id":"24980037-23393167-63233416","span":{"begin":255,"end":257},"obj":"23393167"}],"text":"The timing of biochemical measurements differs among treatment centers and can vary considerably within the same center. Intervals between surgery and biochemical measurement range from 1 to 2 days [14, 15], up to several weeks [16, 17], and even months [14]. As a result, the definition of post-surgical remission is unclear."}