Online Mendelian Inheritance in Man
- Features a list of reported case studies and symptoms, genetic information, and important references.
- http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=OMIM&dopt=Detailed&tmpl=dispomimTemplate&list_uids=194190

Ryley's: A Blog About A Bloke
- Parents' photos and news on their son.
- http://www.ryley.net/blog/

Arran Benjamin Willock
- Includes very detailed month-by-month status reports of a WHS boy born April 2000.
- http://www.willock.net/arran/

4P- Support Group, Inc.
- USA-based non-profit association of families of children with 4p-, offering phone support, newsletters, national biannual gathering and regional meetings.
- http://www.4p-supportgroup.org/

Wolf-Hirschhorn Syndrome
- German WHS Support Group, with information for parents and medical professionals. Includes a very extensive list of symptoms.
- http://www.wolf-hirschhorn.de/

WHS 4p - Support Group UK
- Includes a beginners' guide to the underlying genetic cause. Managed by Mrs C. V. Hilder, mother of a WHS son.
- http://www.whs.webk.co.uk/

eMedicine - Wolf-Hirschhorn Syndrome
- Detailed information on differential diagnosis, genetics, likely clinical history, and symptoms.
- http://www.emedicine.com/ped/topic2446.htm