228. Where the international application relates to deposited microorganisms or other biological material, it is not the responsibility of the receiving Office to check whether indications containing references to such deposited microorganisms or other biological material must be made in the application itself or in relation to it. However, where such references have been furnished, the receiving Office checks them to the extent outlined below and, in certain cases, invites the applicant to correct them or draws the applicant’s attention to certain circumstances.