BOSTON (Reuters) - Proxy adviser Institutional Shareholder Services on Wednesday recommended investors cast advisory votes in favor of the pay of JPMorgan Chase & Co CEO Jamie Dimon at the bank’s annual meeting on May 18. ISS said “cautionary support” for the pay of Dimon and other leaders is warranted despite concerns about the use of discretion by the bank’s compensation committee. The proxy adviser also recommended shareholders back all the bank’s directors up for election despite opposition from climate activists. Reporting by Ross Kerber; Editing by Chris Reese Our Standards: The Thomson Reuters Trust Principles.