Neck/shoulder pain that is associated with pain at other sites is more common and differs epidemiologically from that limited only to the neck or shoulder(s).

^aFederal University of Paraná, Curitiba-PR, Brazil

^bMedical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, United Kingdom

^cArthritis Research UK/MRC Centre for Musculoskeletal Health and Work, University of Southampton, Southampton, United Kingdom

^dSchool of Nursing, University of São Paulo, São Paulo, Brazil

^eCorporación para el Desarrollo de la Producción y el Medio Ambiente Laboral—IFA (Institute for the Development of Production and the Work Environment), Quito, Ecuador

^fDepartment of Industrial Engineering, School of Engineering, Pontificia Universidad Javeriana, Bogotá, Colombia

^gSouthwest Center for Occupational and Environmental Health, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, USA

^hCenter for Disease Control and Prevention/National Institute for Occupational Safety and Health, Atlanta, GA, USA

ⁱMedical Research Council Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry Psychology and Neuroscience, Kings College London, London, United Kingdom

^jCenter for Research in Occupational Health (CiSAL), Universitat Pompeu Fabra, Barcelona, Spain

^kCIBER of Epidemiology and Public Health, Barcelona, Spain

^lIMIM (Hospital del Mar Research Institute), Barcelona, Spain

^mEpidemiology and Preventive Medicine Research Center, University of Insubria, Varese, Italy

ⁿDepartment of Social Medicine, Medical School, University of Crete, Heraklion, Greece

^oInstitute of Technology, Estonian University of Life Sciences, Tartu, Estonia

^pDepartment of Environmental Health, Faculty of Health Sciences, American University of Beirut, Beirut, Lebanon

^qDepartment of Occupational Health, School of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran

^rDepartment of Community Health Sciences, Aga Khan University, Karachi, Pakistan

^sDepartment of Medical Education and Health Sciences, Faculty of Medical Sciences, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka

^tDepartment for Medical Research and Management for Musculoskeletal Pain, 22nd Century Medical and Research Center, Faculty of Medicine, The University of Tokyo Hospital, Tokyo, Japan

^uNational Institute for Occupational Health, National Health Laboratory Service, Johannesburg, South Africa

^vFaculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa

^wDepartment of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia

^xDepartment of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand

^ySchool of Nursing of Ribeirão Preto, University of São Paulo, São Paulo, Brazil

^zProgram Health, Work and Environment in Central America, Institute for Studies on Toxic Substances (IRET), National University of Costa Rica, Heredia, Costa Rica

^aaOccupational Health Service, Parc de Salut MAR, Barcelona, Spain

^bbServicio de Investigación y Análisis IT/EP, Departamento de Investigación y Análisis de Prestaciones, MC Mutual, Barcelona, Spain

^ccDepartment of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy

^ddFondazione Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy

^eeDepartment of Psychiatry, Medical School, University of Crete, Heraklion, Greece

^ffCentre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain

^ggNorth Estonia Medical Centre, Tallinn, Estonia

^hhTartu University Hospital, Tartu, Estonia

ⁱⁱKlinikum Leverkusen, Leverkusen, Germany

^jjDepartment of Physiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka

^kkSection of Epidemiology and Biostatistics, School of Population Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand

^llDepartment of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA

^mmFaculty of Medicine, University of Kelaniya, Kelaniya, Sri Lanka

ⁿⁿDepartment of Joint Disease Research, 22nd Century Medical and Research Center, University of Tokyo, Tokyo, Japan

^ooCentre for Occupational and Environmental Health, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia

^ppInjury Prevention Research Unit, Department of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand

^qqAkzoNobel, Houston, TX, USA

Corresponding author. Address: MRC Lifecourse Epidemiology Unit, Southampton General Hospital, Southampton SO16 6YD, United Kingdom. Tel.: +44 2380 777624; fax: +44 2380 704021. E-mail address: dnc@mrc.soton.ac.uk (D. Coggon).

Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.

Received October 01, 2015

Received in revised form December 17, 2015

Accepted December 22, 2015