oh a ▁Round ▁began ▁with ▁a ▁minister ial - level ▁meeting ▁in ▁D oh a , ▁Q atar ▁in ▁ 2 0 0 1 . ▁The ▁aim ▁was ▁to ▁put ▁less ▁developed ▁countries ' ▁prior ities ▁at ▁heart . ▁The ▁needs ▁of ▁the ▁developing ▁countries ▁were ▁the ▁core ▁reasons ▁for ▁the ▁meeting . ▁The ▁major ▁factors ▁discussed ▁include ▁trade ▁facil itation , ▁services , ▁rules ▁of ▁origin ▁and ▁dispute ▁settlement . ▁Special ▁and ▁differential ▁treatment ▁for ▁the ▁developing ▁countries ▁were ▁also ▁discussed ▁as ▁a ▁major ▁concern . ▁Sub sequ ent ▁minister ial ▁meet ings ▁took ▁place ▁in ▁Can c ún , ▁Mexico ▁( 2 0 0 3 ), ▁and ▁Hong ▁Kong ▁( 2 0 0 5 ). ▁Rel ated ▁negoti ations ▁took ▁place ▁in ▁Paris , ▁France ▁( 2 0 0 5 ), ▁P ots dam , ▁Germany ▁( 2 0 0 7 ), ▁and ▁Gene va , ▁Switzerland ▁( 2 0 0 4 , ▁ 2 0 0 6 , ▁ 2 0 0 8 ); ▁ ▁Progress ▁in ▁negoti ations ▁st alled ▁after ▁the ▁break down ▁of ▁the ▁July ▁ 2 0 0 8 ▁negoti ations . ▁The ▁most ▁significant ▁differences ▁are ▁between ▁developed ▁nations ▁led ▁by ▁the ▁European ▁Union ▁( E U ), ▁the ▁United ▁States ▁( US ), ▁Canada , ▁and ▁Japan ▁and ▁the ▁major ▁developing ▁countries ▁led ▁and ▁represented ▁mainly ▁by ▁India , ▁Brazil , ▁China , ▁and ▁South ▁Africa . ▁There ▁is ▁also ▁considerable ▁cont ention ▁against ▁and ▁between ▁the ▁EU ▁and ▁the ▁US ▁over ▁their ▁maintenance