MEDICAL experts have called on Canberra to shut down a university chiropractic clinic aimed at children amid claims the theories behind the practice are "no better than witchcraft" and using it on children is akin to child abuse.

More than half a dozen experts, many of them professors with international reputations, have written to voice concerns about the clinic at Melbourne's RMIT University, warning that chiropractic treatments for children's conditions are useless, at best, and "may well cause serious harm".

Authorities such as cervical cancer vaccine inventor Ian Frazer, evidence-based medicines expert Chris del Mar and prominent clinician John Dwyer are among those who have backed the concerns.

Their interventions were made in support of a document sent to federal Health Minister Nicola Roxon by a Queensland resident, Loretta Marron, a long-standing campaigner for rational and evidence-based healthcare and regulation.

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