TY - JOUR AU - Heritier Stephane AU - Hudson Malcolm AU - Lo S. BT - Computational Statistics & Data Analysis CN - Y LA - eng LB - Statisticsjournal M1 - 1 PY - 2009 SP - 683 EP - 98. T2 - Computational Statistics & Data Analysis TI - Saddlepoint Approximation for Semi-Markov Processes with application to a cardiovascular randomized study VL - 53 ER -