Retrospectiveapplication of this Standard on new or facelift vehicles or components on which the PDS or design was defined prior to the above date shall be at the discretion of the design Engineer.
Methods Retrospective analysis was made for 235 cases on the following items: age at IUD removal, years after menopause, preoperative estrogen application and the cause of IUD removal.
方法对235例绝经后取环病例有关的取环年龄、绝经年数、术前雌激素应用以及取环原因等进行回顾性分析。
3
Methods: Retrospective analysis of the application of fiber bronchoscope in 68 cases of PTTs.