EU clinical trial regulation: are the medicines agencies ready to achieve a single opinion? - Payares Herrera, Concepcion; Velasco Iglesias, Ana; Sancho Lopez, Arantxa; Salcedo De Diego, Isabel; Ruiz Antoran, Belen; Ascaso Del Rio, Ana; Gomez Barrena, Enrique; Avendano Sola, Cristina (BASIC & CLINICAL PHARMACOLOGY & TOXICOLOGY, 2018)