Fig. 1. Comparison of procedure time by the modified formalin-ether concentration using the Para Tube (Para-FEC) and the conventional formalin-ether concentration (C-FEC) methods, according to the increasing number of tests simultaneously. While the mean time for a single test was comparable in the two methods, the procedure time using the Para Tube was reduced compared with that required by the conventional method, when five samples were tested simultaneously.