BACKGROUND Indications for corneal transplantation in developed and developing nations differ according to the different spectrum of corneal disease in each country. OBJECTIVE The purpose of this study is to analyze the changing indications and surgical techniques for corneal transplantation over the past 20 years at a tertiary referral center in Turkey. METHODS We retrospectively reviewed ...

The Oslo Multiple Sclerosis (MS) Registry was established in 1990, and this is the first report on the prevalence and incidence of MS in the city of Oslo, Norway. The prevalence rate of definite MS on 1 January 1995 was 120.4/10(5). Inclusion of patients of native Norwegian ancestry only and exclusion of non-Norwegian immigrants yielded a prevalence rate of 136.0/10(5). A similar prevalence rat...

BACKGROUND Cancer incidence and mortality rates have decreased over the last few decades, yet not all groups have benefited equally from these successes. This has resulted in increased disparities in cancer burden among various population groups. OBJECTIVE This study examined trends in absolute and relative disparities in overall cancer incidence and mortality rates between African American a...

CONTEXT The number of authors per article has increased markedly in recent years. Little is known about the hierarchical order of authorship and its change over time. OBJECTIVE To assess the change in number and profile of authors of original articles published over a 20-year period in BMJ. It was hypothesized that the number of authors increased over this 20-year period and that it was the s...

OBJECTIVE To review the evolution of the procedure, the reoperation rate and efficacy data for vasectomies performed in Marie Stopes centres during the periods 1990-1994 and 1995-1999. DESIGN Retrospective review of re-operation rates and primary and secondary failures during the periods 1990-1994 and 1995-1999. SETTING Marie Stopes vasectomy centres in the UK. PARTICIPANTS A total of 41 ...