DUBAI, Sept 4 (Reuters) - Here are some factors that may affect Middle East stock markets on Thursday. Reuters has not verified the press reports and does not vouch of their accuracy.INTERNATIONAL/REGIONAL* GLOBAL MARKETS-Asian shares hit 7-year high on Ukraine, ECB hopes MKTS/GLOB* Oil gains more than $2, Brent rebounds from 16-month low O/R* Gold retains modest gains, but stays near 2-1/2 mth lo