DAUGHTER ENTERED PASSENGER SIDE OF VAN THROUGH LARGE SLIDING DOOR. FRONT PASSENGER SEAT WAS FULLY FORWARD. FELL ON EXPOSED SEAT ADJUSTMENT RAILS. REQUIRED 13 STITCHES TO CLOSE WOUND JUST BELOW KNEE. RAILS WERE MANUFACTURED WITH SHARP 90 DEG CORNERS AND NO PROTECTION. RAILS ARE EXPOSED BY APPROX 4 INCHES WHEN FRONT PASSENGER SEAT IS FULLY FORWARD. SAME PROBLEM EXISTS ON DRIVER'S SIDE. *TR