retrospective study造句怎么写

Purpose: This retrospective study evaluated the change in pharyngeal airway space associated with surgical mandibular setback.

Methods: a retrospective study of percutaneous bladder pneumatic lithotripsy used for treating 16 children with bladder stones was conducted.

Methods:With the retrospective study method, the four diagnosis materials of 194 patients(all over 55 year- old) with depression were collected and the syndrome elements were summarized and analyzed.

This was a retrospective study of measles cases and deaths in Nepal.

Study Design. A retrospective study on patients with chronic nonspecific low back pain (NSLBP).

Method:A retrospective study was carried out of 178 patients with uterine myoma(UM). Correlative myomectomy were preformed based on the different types and size of UMs.