UK's Convatec falls after CEO takes medical leave
** Shares of British medical equipment maker Convatec Group CTEC.L down 1% at 228.6 pence ** Co says CEO Karim Bitar to take medical leave of absence ** Co appoints Jonny Mason, current CFO, as interim CEO ** Appoints Group Financial Controller Fiona Ryder as interim CFO ** Including session moves, CTEC down 3.7% YTD (Reporting by Nithyashree R B in Bengaluru) ((NithyashreeRB@thomsonreuters.com))