Absence or reduced levels of PROTHROMBIN in the blood.
http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Lng=FR&Expert=325 France French rare diseases hypoprothrombinemias scientific and technical information
--- http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Lng=FR&Expert=26348 France French scientific and technical information rare diseases hypoprothrombinemias