Methods: This was a prospective randomized study.
方法：随机的前瞻性研究。
Patients and METHODS: This was a prospective, randomized, crossover study of 42 patients with longstanding ulcerative colitis.
病人与方法：本研究为前瞻性随机交叉试验研究。42例长期溃疡性结肠炎患者纳入。
Methods: It's a prospective randomized control study.
方法：采用前瞻性随机对照临床研究方法。
Methods: The prospective, randomized, and controlled study was conducted in 40 patients wi th acute severe urinary tract infections.
方法：采用前瞻、随机和对照的设计方案，符合入选标准的40例中、重度泌尿系统感染患者纳入本研究。
Methods: The prospective, randomized, and controlled study was conducted in 40 patients wi th acute severe urinary tract infections.
方法：采用前瞻、随机和对照的设计方案，符合入选标准的40例中、重度泌尿系统感染患者纳入本研究。
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