The CONSORT flow diagram.
TMD, headaches, muscular or joint diseases, psychiatric, allergies, whiplash-associated disorders
RHEUMATOID ARTHRITIS, RECRUITMENT, FIBROMYALGIA, DISORDERS, ALLERGIES, NEUROLOGICAL DISORDERS
Inclusion criteria for participating was men and women aged between 18–40 years in good general health. Exclusion criteria eliminated those with any pain-related diagnosis of TMD in the orofacial region, with headaches, systemic muscular or joint diseases (fibromyalgia or rheumatoid arthritis), whiplash-associated disorders, neurological disorders, psychiatric disorders, or allergies to any of the substances used. Recruitment of participants was done mainly through information to students at the Odontology Department at Karolinska Institutet in Huddinge, Sweden. Further information was given about the study, both in writing and verbally, to participants before the study began.