is there such a thing as professional potty trainers?

[annys]

i'm writing a story for a local paper about specialized services for parents and was wondering if anyone has come across folks (consultants, psychologists, pediatricians,etc.) who help with potty training? has anyone hired such a person? i'm looking for any information about this: suggestions of people to talk to, the cost of the service, personal experiences, etc. i can be reached at annys.shin AT gmail.com. any help is appreciated. thanks.