Although it had been brought to our attention that experiments described in the above article used radioisotopic techniques requiring licensing not currently held by the authors affiliated institution. Dr. Hari Singh Gour University, Sagar, India, upon investigation the study was proved to be a collaborative effort between groups at Dr Hari Singh Gour University, Jawaharlal Nehru Cancer Hospital, Research Center Bhopal, and IGIB New Delhi. Copies of licensing certificates for all experiments described in the article have now been received by the publisher.
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