"Efficacy of analgesics in chronic pain: a series of N-of-1 studies"@en . "Efficacy of analgesics in chronic pain: a series of N-of-1 studies"@nl . . . "15" . . "Efficacy of analgesics in chronic pain: a series of N-of-1 studies"@en . "scientific article published on 01 April 1998"@en . . "Efficacy of analgesics in chronic pain: a series of N-of-1 studies"@nl . . "4" . . "M Cohen" . . . "9601160" . . . . . . . "Efficacy of analgesics in chronic pain: a series of N-of-1 studies"@en . . . . . . . "\u043D\u0430\u0443\u043A\u043E\u0432\u0430 \u0441\u0442\u0430\u0442\u0442\u044F, \u043E\u043F\u0443\u0431\u043B\u0456\u043A\u043E\u0432\u0430\u043D\u0430 \u0443 \u043A\u0432\u0456\u0442\u043D\u0456 1998"@uk . . "Efficacy of analgesics in chronic pain: a series of N-of-1 studies"@nl . . . . . . . . "244-252" . "10.1016/S0885-3924(98)00369-8" . "1998-04-01T00:00:00Z"^^ . . "R B Sheather-Reid" . . . "im April 1998 ver\u00F6ffentlichter wissenschaftlicher Artikel"@de . . . . "Efficacy of analgesics in chronic pain: a series of N-of-1 studies"@en . . . "art\u00EDculu cient\u00EDficu espubliz\u00E1u n'abril de 1998"@ast . "wetenschappelijk artikel"@nl .