TY - CONF AU - Couce Pico, MarĂ­a Luz PY - 2011 SN - 0141-8955 UR - http://hdl.handle.net/20.500.11940/6746 LA - eng TI - New evidence for assessing tetrahydrobiopterin-responsiveness in phenylketonuria delimiting the scope of the tetrahydrobiopterin loading test VL - 34 ER -