E. Lesaffre and B. Spiessens: On the effect of the number of quadrature points in a logistic random-effects model: an example - Journal of the Royal Statistical Society, Applied Statistics, Series C, Volume 50 (2001) part 3, pages 325 - 335 The data have kindly been made available by Novoartis, Belgium. The source of the data must be acknowledged in any publication which uses them. Column Variable 1 identification number of the patient (idnr) 2 binary response (y) 3 treatment group (trt) 4 time of measurement (time) 5 visit number (visit)