A comment regarding shipping The test kit does not endure room temp for long. The kits I got the first time using regular oversees mail had spent a few days in transit, and changed color (like was mentioned above by someone). The lab was gracious to send me a new kit with no charge. This time I have paid for door-to-door FedEx delivery, and the kit arrived in the documented color (more or less). For me - the fast shipment plus customs handling more than doubled the price (but it is still reasonable). r.