There exists a growing literature on the estimation of gamma distributed multiplicative shared frailty models. There is, however, often a need to model more complicated frailty structures, but ...

2 Finnish Centre for Evidence-Based Orthopedics (FICEBO), University of Helsinki, Helsinki, Finland Objectives To assess the long-term effects of arthroscopic partial meniscectomy (APM) on the ...

In a regression setting, the partial correlation coefficient is often used as a measure of `standardized' partial association between the outcome y and each of the ...