BRIEF-GlaxoSmithKline CEO says any ViiV IPO likely to be 2016 event

Feb 4 (Reuters) - GlaxoSmithKline Plc CEO Andrew Witty tells reporters: * CEO says any ViiV IPO likely to be 2016 event * CEO says globally scaled businesses post-Novartis deal will have more options * CEO says not giving any guidance for 2016 dividend * CEO says share of new respiratory patients in Japan, U.S. has started to go