Methods and kits for determining appropriate treatment for illnesses in humans or animals are disclosed. A rule editor may access business rule components and assemble the components to form a graphical display of a business rule. In the accommodating space in the equipment accommodating case, a control valve unit for controlling supplydischarge of the operating oil and a urea water tank storing urea water for removing nitrogen oxides contained in an exhaust gas of the engine are arranged together. The method further includes placing a value in the virtual network identifier field identifying the virtual network associated with the data frame and transmitting the data frame over the shared communications medium.