Behavioral and biological divergence in monozygotic twin pairs discordant for autism phenotypes: A systematic review.

Background: Non-shared environment (NSE) effects account for around one-third of the etiology of autism spectrum disorder (ASD). However, the knowledge of mechanisms and phenotypic profiles associated with NSE in ASD is scarce.

Methods: A systematic search was conducted using Embase, MEDLINE, and PsycINFO for studies published in English between 1990 and August 2020 using co-twin control design to compare behavioral and biological phenotypes among monozygotic (MZ) twin pairs concordant/discordant for ASD, clinical autism symptoms, or autistic traits.

A randomized pilot study on self-management in head and neck lymphedema.

Background: The purpose of this pilot trial was to determine the feasibility of a self-managed lymphedema randomized control trial to test the effectiveness of a head and neck-specific exercise protocol.

Methods: Nine participants were randomized to receive usual treatment provided by an Australian metropolitan teaching hospital (n = 4) or usual treatment with an added head and neck exercise regime (n = 5). Feasibility was assessed through ease of recruitment, adherence, and safety.