Valvular Heart Disease Associated with Long-term Treatment by Methysergide: a Case ReportMichel Andréjak, Catherine Szymanski, Sylvestre Maréchaux, Elise Arnalsteen, Valérie Gras, Jean-Paul Rémadi et Christophe TribouilloyTherapie, 69 3 (2014) 255-257DOI: https://doi.org/10.2515/therapie/2014030