standard. Future developments Recently, researchers have added medical sensors into these toilets, which can measure the blood sugar based on the urine, and also measure the pulse, blood pressure, and the body fat content of the user. Talking toilets that greet the user have also started being made. Other measurements are currently being researched. The data may automatically be sent to a doctor through a built-in internet-capable cellular telephone. However, these devices are still very rare in Japan, and their future commercial success is difficult to predict. A voice-operated toilet that understands verbal commands is under development. Toto, NAiS (a division of Panasonic), and other companies also produce portable, battery-operated travel washlets, which must be filled with warm water before use. Washlet Syndrome The repetitive use of a "type water jet on a high-pressure setting for an enema, can weaken the capability for self-evacuation of the Washlet user, which can lead to more serious constipation." If a Washlet high-pressure water jet is used on the anus repeatedly, it may cause excessive cleanliness, prompting other bacteria to adhere around the anus, causing skin disease (inflammation) around the anus. Some proctologists in Japan have named this or . There have been claims of benefit in preventing urinary tract infections and also concerns that washlet use can cause increased risk of urinary tract infection, aggravate vaginal flora when the bidet feature is used, and cause cross-contamination from the wand and/or water tank, but the effects appear to be minimal and neither a substantial risk or of measurable benefit for healthy adults. Urinals Urinals in Japan are very similar to the urinals in the rest of the world, and mainly used for public male toilets or male toilets with a large number of users. They often are, however, mounted lower compared to urinals in the West. Female urinals never caught on in Japan, although there were attempts made to popularize the American Sanistand female urinal by the Japanese toilet manufacturing company Toto between 1951 and 1968. This device was shaped like a cone and placed on the floor. However, those were never very popular, and only a few of them remain, including those underneath the now demolished National Olympic Stadium from the 1964 Summer Olympics in Tokyo, which was added to accommodate people from a wide range of cultures. Japan-specific accessories Toilets in Japan have very similar accessories as most toilets worldwide, including toilet