Definition of treatment-resistant late-life depression: Conclusions from a European task force Delphi process

B Pozuelo Moyano, A von Gunten, C Mueller, R Yaman-Deveci, R Howard, R Stewart, A Young, H Costello, S Bulteau, B Calvet, S Bonin-Guillaume, N Hoertel, G H Robert, J Roche, A Lepetit, S Louchart de la Chapelle, L Agüera-Ortiz, J Pla-Vidal, F Bouckaert, O Voshaar, L Fernandes, O Vasiliu, M Dominiak, J Priller, M Preisig, F Triolo, M Belvederi Murri, E Aakhus, S Ranjbar, K Swierkosz-Lenart, V Orgeta, P Vandel