Nocebo is the enemy, not placebo. A meta-analysis of reported side effects after placebo treatment in headaches

Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement

(2013) David Moher   ANNALS OF INTERNAL MEDICINE

Nocebo effects in multiple sclerosis trials: a meta-analysis

(2010) D. Papadopoulos et al.   Multiple Sclerosis Journal

Shared genetic factors in migraine and depression: Evidence from a genetic isolate

(2010) A. H. Stam et al.   NEUROLOGY

The Epidemiology, Burden, and Comorbidities of Migraine

(2009) Marcelo E. Bigal et al.   NEUROLOGIC CLINICS

Randomized, controlled trial of telcagepant for the acute treatment of migraine

(2009) K. M. Connor et al.   NEUROLOGY

A systematic review of adverse events in placebo groups of anti-migraine clinical trials

(2009) Martina Amanzio et al.   PAIN

Placebo and Nocebo Effects Are Defined by Opposite Opioid and Dopaminergic Responses

(2008) David J. Scott et al.   ARCHIVES OF GENERAL PSYCHIATRY

A Functional Magnetic Resonance Imaging Study on the Neural Mechanisms of Hyperalgesic Nocebo Effect

(2008) J. Kong et al.   JOURNAL OF NEUROSCIENCE

New Insights into the Placebo and Nocebo Responses

(2008) Paul Enck et al.   NEURON

The role of learning in nocebo and placebo effects

(2008) L. Colloca et al.   PAIN