Members of Korean pop sensation the Wonder Girls, who have been expanding their singing career into the United States, have stepped forward to rebut claims made by their former English teacher that they were mistreated by their agency JYP Entertainment (JYPE). Daniel Gauss, who taught the girls from October 2009 to May 2010, had stated in an email interview with local English daily The Korea Herald published yesterday that the girls were ill-treated in the U.S., including not having health insurance and being housed illegally. JYPE CEO Jung Wook had denied the accusations later in the day which has been followed on Wednesday by the girl group's leader Sun and another member Yenny siding with their agency through remarks they posted online. Sun addressed the allegations on the quintet's official fan site, starting with Gauss' argument that she had to perform at a concert for mobile phone manufacturer Sony Ericsson, which the girls endorse in the Asia-Pacific region, despite her father suddenly lapsing into a coma. She said her dad, who had been suffering from an illness for a while, became increasingly sick a few months ago, but she was able to fly into Korea immediately and even look after him for a week. She went onto explain that her dad's condition improved during the seven-day period and after consulting with her family and their doctor, engaged in pre-scheduled activities in Korea with her group who had flown in the following week. Sun affirmed that her English teacher's statements "are not true" and added, "I cannot help but feel a bit taken aback by him talking publicly about my personal life."