Asian shares tentative as global growth concerns linger

By Hideyuki Sano TOKYO (Reuters) - Asian shares got off to a cautious start on Thursday after more dour economic news in China and the United States prompted a bruising selloff the previous day. Worries that an eventual tightening in U.S. monetary policy and slower growth in China could knock the global economy have scared off investors, particularly those invested in stocks and commodities. MSCI's broadest index of Asia-Pacific shares outside Japan was up a touch in early trade after having pos