To compare the real-world frequency, timing, duration, difficulty, and helpfulness of three infant Behavioral Sleep Intervention (BSI) approaches: Unmodified Extinction, Modified Extinction, and Parental Presence, and to examine the effectiveness and safety of these approaches by comparing infant sleep, parent sleep, daytime sleepiness, depression, and parent-infant bonding between parents who had and had not implemented these interventions. source https://www.jpeds.com/article/S0022-3476(22)01000-9/fulltext?rss=yes