Erratum to "A novel modulated excitation imaging system for microultrasound\´\´ [Jul 13 1884-1890]

Two co-corresponding authors should have been identified in the above titled paper (ibid., vol. 60, no. 7, pp. 1884-1890, Jul. 2013). The byline should have read as: Weibao Qiu, Yanyan Yu, Fu Keung Tsang, Hairong Zheng*, and Lei Sun* and the footnote on the first page should have read as presented here.