Wallace, M. S., North, J., Grigsby, E. J., Kapural, L., Sanapati, M. R., Smith, S. G., Willoughby, C., McIntyre, P. J., Cohen, S. P., Rosenthal, R. M., Ahmed, S., Vallejo, R., Ahadian, F. M., Yearwood, T. L., Burton, A. W., Frankoski, E. J., Shetake, J., Lin, S., Hershey, B., Rogers, B., & Mekel-Bobrov, N. (2018). an Integrated Quantitative Index for Measuring Chronic Multisite Pain: The Multiple Areas of Pain (MAP) Study. Pain medicine, 19(7), 1425–1435. http://access.bl.uk/ark:/81055/vdc_100116622541.0x000010