AMG 334 20160172 Pediatric Migraine PK Study.

Inclusion Criteria: * Subject's legally acceptable representative has provided informed consent and the subject has provided written assent based on local regulations and/or guidelines prior to any study-specific activities/procedures being initiated. * Male and female children and adolescents ≥ 6 and \<18 years of age upon entry into screening * Diagnosis of migraines, with or without aura, according to the International Classification of Headache Disorders (ICHD 3rd Edition, 2013) for at least 12 months prior to the study screening * Frequency of migraine of ≥ 4 migraine days per month in each of the 3 months prior to the study screening period Exclusion Criteria: * Currently receiving treatment in another investigational device or drug study * History of migraine with brainstem aura or hemiplegic migraine headache * Medical history or other condition that compromises the ability of the subject or legally acceptable representative to give appropriate informed consent and/or assent * Malignancy except non-melanoma skin cancers or cervical cancer in situ within the last 5 years. * Presence of any clinical condition that in opinion of the investigator might increased the risk of subjects participating in the study.