In the past Y. Liu has collaborated on articles with C.K. Hu and R.N. Parkins. One of their most recent publications is Case reportIsolation of virulent treponema pallidum from human aorta thirty-two hours after death from cardiovascular syphilis. Which was published in journal The American Journal of Medicine.
More information about Y. Liu research including statistics on their citations can be found on their Copernicus Academic profile page.