2020, Virtual Meeting 2019, Montreal 2018, Paris 2017, Honolulu 2016, Singapore 2015, Toronto 2014, Milan 2013, Salt Lake City 2012, Melbourne 2011, Montréal 2010,Stockholm 2009,Honolulu 2008,Toronto 2007,Berlin
2020,**** 2019, Shanghai 2018, Beijiang 2017, Taiyuan 2016, Suzhou 2015, Wuhan 2014, Changsha 2013, Hangzhou 2012, Xiamen 2011, Beijing 2010, Shanghai 2009,**** 2008, Shenzhen 2007, Dalian
