What is the fine-grained topic of the following text: Ignat M1, Teletin M, Tisserand J, Khetchoumian K, Dennefeld C, Chambon P, Losson R, Mark M.
Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Université Louis Pasteur, BP 10142, 67404 Illkirch Cedex, France. Only return the topic.
The text doesn't provide enough context to determine a fine-grained topic. It appears to be a list of authors and their affiliated research institution in France, but there's no specific academic or scientific subject mentioned.