Dysfunctional labor: Case definition & guidelines for data collection, analysis, and presentation of immunization safety data.
Boatin AA, Eckert LO, Boulvain M, Grotegut C, Fisher BM, King J, Berg M, Adanu RMK, Reddy U, Waugh JJS, Gupta M, Kochhar S, Kenyon S. Dysfunctional labor: Case definition & guidelines for data collection, analysis, and presentation of immunization safety data. Vaccine. 2017 12 04; 35(48 Pt A):6538-6545.