- Mental Health Aspects of Developmental Disabilities (MH/DD) is the first and only journal exclusively devoted to the mental health needs of persons with mental retardation and developmental disabilities. MH/DD is a peer-reviewed interdisciplinary publication, with four (4) issues per year. The journal covers mental health aspects of diagnosis, treatment and habilitation needs of persons with mental retardation and developmental disabilities.www.mhaspectsofdd.com