710. Gifts inter vivos made in favour of ministers of religion, of physicians and others attending the donor with the view of restoring his or her health, or of advocates and attorneys engaged in lawsuits in his behalf, are presumed to be invalid, but may be confirmed by the Court in whole or in part. Transfers made under the above circumstances, even when apparently under the form of onerous contracts, are presumed to be gifts inter vivos, and are liable to be impugned as such.