Superstores Walmart and Macy's have joined up with such big names as Liz Claiborne, Nike, Eileen Fisher and Nautica [part of VF Corp.] to sign a pledge boycotting the use of cotton from Uzbekistan, WWD reported. They are among the first companies to team up with the nonprofit group Responsible Sourcing Network to demand that the country stop using forced child labor to harvest its cotton crop. The group's organizers claim that two million children are forced to leave school annually and work in the fields for two months during harvest time, facing harmful chemicals and pesticides...The group expects to have 70 companies representing hundreds of brands on board by the time New York Fashion Week begins in September, WWD reported.