Video intervention for the psychiatric waiting room: proof-of-concept randomised controlled trial of RESOLVE (Relaxation Exercise, SOLVing problem and cognitive Errors) oleh Farooq Naeem, Tariq Munshi, David Gratzer, David Rodie, Muhammad Irfan, Sanjay Rao, Nusrat Husain, Saeed Farooq, Marcos Sanches, Muhammad Ayub, Tania Lecomte