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Darren Chua,Albert Low,Yexin Koh,Brian Goh,Peng Chung Cheow,Juinn Har Kam,Jin Yao Teo,Ek Khoon Tan,Alexander Chung,London Lucien Ooi,Chung Yip Chan,Ser Yee Lee 한국간담췌외과학회 2018 Annals of hepato-biliary-pancreatic surgery Vol.22 No.3
Backgrounds/Aims: Hilar cholangiocarcinomas (HCCAs) are tumors that involve the biliary confluence; at present, radical surgery offers the only chance of long-term survival, but this can be challenging given the complexity of the hilar anatomy. Blumgart and Jarnagin described a preoperative staging system that incorporates the effect of local tumor extent and its impact on adjacent structures and that has been demonstrated to correlate better with actual surgical resectability. The primary aim of this study is to describe the correlation between preoperative Blumgart-Jarnagin staging and its correlation with surgical resectability. Methods: Patients who underwent surgical resection for hilar cholangiocarcinoma at Singapore General Hospital between January 1, 2002, and January 1, 2013, were identified from a prospectively maintained institutional database. All patients were staged based on the criteria described by Blumgart and Jarnagin. Correlation with surgical resectability was then determined. Results: A total of 19 patients were identified. Overall resectability was 57.8% (n=11). Patients with Blumgart-Jarnagin stage T1 had the highest rates of respectability at 80%; patients with stage T2 and T3 disease had resectability rates of 25% and 40% respectively. Median overall survival was 13.6 months. Conclusions: The Blumgart-Jarnagin staging system is useful for predicting tumor respectability in HCCA.
Tai-Young Kim,Albert C Y Teo 한국인사ㆍ조직학회 2006 한국인사ㆍ조직학회 발표논문집 Vol.- No.-
This study examines the longitudinal membership dynamics of nonprofits. Prior research on nonprofit membership dynamics has focused on the micro dynamics of members joining or leaving nonprofits at the individual level. As a consequence, effects of organizational exogenous factors such as contested ideologies, collective action and competition among the state, organizations, and their representative association in political and identity domains has been under-theorized with the implicit assumption that these exogenous factors do not play a significant role on membership dynamics. We incorporate these three factors in our models as key factors to show how the membership growth rates of nonprofits evolve by looking at longitudinal dynamics of huiguans, Chinese immigrant organizations in Singapore, 1820-1998. We discuss some general implications regarding roles of the state, collective action, competition, and the membership dynamics of nonprofits.
Innovation, Market Position Change and Mortality among U.S. Automobile Manufacturers, 1885-1981
Tai-Young Kim(김태영),Anand Swaminathan,Albert C y Teo,배종훈(토론자) 한국전략경영학회 2006 한국전략경영학회 학술대회발표논문집 Vol.- No.-
We argue that organizational scope and niche crowding increase the rate of technological innovation, particularly in the case of incremental innovation, while prior experience in another industry lowers the rate of both incremental and radical innovation. Further, we argue that while innovation itself may improve an organization's survival chances, its simultaneous occurrence with other organizational changes such as a change in market position is likely to lower its survival chances. Using data on all American automobile manufacturers from 1885-1981, we find substantial support for our predictions. Our results are consistent with the implications of a cascading model of organizational change with incremental innovations providing survival benefits and radical innovations lowering survival chances when they occur jointly with market position change.