For more information, see these articles on infant sleep problems and infant sleep aids. (parentingscience.com)
Response bias was likely to be minimal as mothers who did not respond were no more likely to be depressed or report more severe infant sleep problems at baseline than mothers who did respond. (pediatrics.aappublications.org)
Comparison of two strategies to improve infant sleep problems, and associated impacts on maternal experience, mood and infant emotional health: a single case replication design study. (parentingscience.com)