Soares, J.D., Ferreira, M., Póvoa, P., da Silva, J.A., Santos, M.J. and Carlos, A.G. 1993. Functional assessment of the autonomic nervous system in rheumatoid arthritis. Acta Médica Portuguesa. 6, 6 (Jun. 1993), 245–8. DOI:https://doi.org/10.20344/amp.3094.