India, June 28 -- HDFC Bank has said an independent legal review conducted by two external law firms found no evidence to substantiate concerns raised by former chairman Atanu Chakraborty in his resignation letter or subsequent public statements. The bank said the review, announced on March 24, examined whether any concerns flagged by Chakraborty were evident from the records, whether he had recorded any dissent during his tenure, and whether such dissent, if any, had been addressed. Chakraborty resigned as chairman of the country's second biggest lender, HDFC Bank, citing ethical concerns. This was the first time that a part-time chairman of HDFC Bank left mid-way, raising concerns over its functioning. "Certain happenings and practices ...