Choice of units of analysis and modeling strategies in multilevel hierarchical models. - José Cortiñas Abrahantes; Geert Molenberghs; Tomasz Burzykowski; Ziv Shkedy; Ariel Alonso Abad; Didier Renard (Comput. Stat. Data Anal., 2004)

Flexible surrogate marker evaluation from several randomized clinical trials with continuous endpoints, using R and SAS. - Abel Tilahun; Assam Pryseley; Ariel Alonso Abad; Geert Molenberghs (Comput. Stat. Data Anal., 2007)

A family of tests to detect misspecifications in the random-effects structure of generalized linear mixed models. - Ariel Alonso Abad; S. Litière; Geert Molenberghs (Comput. Stat. Data Anal., 2008)

Using earlier measures in a longitudinal sequence as a potential surrogate for a later one. - Assam Pryseley; Abel Tilahun; Ariel Alonso Abad; Geert Molenberghs (Comput. Stat. Data Anal., 2010)

Generating random correlation matrices with fixed values: An application to the evaluation of multivariate surrogate endpoints. - Alvaro Jóse Flórez; Ariel Alonso Abad; Geert Molenberghs; Wim Van Der Elst (Comput. Stat. Data Anal., 2020)

An efficient algorithm to assess multivariate surrogate endpoints in a causal inference framework. - Alvaro Jóse Flórez; Geert Molenberghs; Wim Van Der Elst; Ariel Alonso Abad (Comput. Stat. Data Anal., 2022)