A literature search in MEDLINE, EMBASE and CENTRAL identified 12 eligible studies, 10 of which were retrospectie.
A literature search in MEDLINE, EMBASE and CENTRAL identified 12 eligible studies, 10 of which were retrospectie.
患者只参加一次试验的研究是合格的研究。
A literature search in MEDLINE, EMBASE and CENTRAL identified 12 eligible studies, 10 of which were retrospectie.
患者只参加一次试验的研究是合格的研究。