Mumbai: The health of Ratan Tata, Tata Group and Tata Sons Chairman Emeritus and a stalwart of Indian industry, who went in for a routine checkup recently, may have taken a turn for the worse. Tata, who checked into a hospital recently, ruled out any critical illness on his social media handle earlier this week. However, since then his condition may have turned critical, Reuters reported, citing \people familiar with the matter.