ACR and fibromyalgia: Patients with a FibroDetect score ≤ 3 are unlikely to be ACR + patients, and should thus not be referred to a fibromyalgia specialist; patients with a FibroDetect score of 4 or 5 may require further evaluation to decide whether they should be referred to a fibromyalgia specialist; patients with a FibroDetect score ≥ 6 are likely to be ACR + patients, and should thus be referred to a fibromyalgia specialist.