A joint model for the dependence between clustered times to tumour progression and deaths: A meta-analysis of chemotherapy in head and neck cancer. Rondeau, V.; Pignon, J. P.; Michiels, S.; Group, Mach-Nc collaborative. Stat Methods Med Res. 2015; 711-29: p.711-29. doi:10.1177/0962280211425578 10.1177/0962280211425578. Epub 2011 Oct 23.Article