{"id":"W2035229537","doi":"10.1097/00002508-200409000-00002","title":"Endogenous Opioids and Chronic Pain Intensity","year":2004,"lang":"en","type":"article","venue":"Clinical Journal of Pain","topic":"Pain Mechanisms and Treatments","field":"Medicine","cited_by":23,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"National Center for Research Resources; National Institute of Neurological Disorders and Stroke","keywords":"Medicine; Placebo; Chronic pain; Endogenous opioid; Opioid; Crossover study; Anesthesia; Analgesic; McGill Pain Questionnaire; (+)-Naloxone; Randomized controlled trial; Physical therapy; Internal medicine; Visual analogue scale","routes":{"ca_aff":false,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0004220987,0.0001764397,0.0002043013,0.0001372592,0.00006212776,0.0002065701,0.0001363578,0.0001825587,0.003339915],"category_scores_gemma":[0.001342879,0.00006200661,0.0001021556,0.0001165382,0.0001794557,0.0001112422,0.0001604704,0.0002203619,0.0001210675],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0001430626,"about_ca_system_score_gemma":0.0001143887,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0001782286,"about_ca_topic_score_gemma":0.0002255421,"domain_scores_codex":[0.9996871,0.0001070457,0.0000257787,0.0000364341,0.0001105113,0.00003320309],"domain_scores_gemma":[0.9991461,0.0002814665,0.0003616188,0.00002703147,0.00006263608,0.0001211257],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.04748298,0.005999927,0.5149341,0.002795075,0.0008434687,0.0004789898,0.0004242368,0.0008603064,0.2282915,0.0005350118,0.0005024775,0.1968518],"study_design_scores_gemma":[0.0009763721,0.02005838,0.9731415,0.00009431001,0.0001333172,0.0004650764,0.00005302991,0.000345904,0.003615191,0.0001181271,0.0009897816,0.000009067185],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9949126,0.003965743,0.0002228368,0.00005109145,0.00001046007,0.00004396943,0.00009041864,0.000002964563,0.0006998451],"genre_scores_gemma":[0.9980125,0.001006256,0.0003352718,0.00005400575,0.00003349215,0.00005446593,0.000114996,9.549383e-7,0.0003878559],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.003339915,"threshold_uncertainty_score":0.01117313,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.07062707745545614,"score_gpt":0.3503976648415468,"score_spread":0.2797705873860907,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}