Fig. 2
From: Thyroid dysfunction in preterm infants born before 32 gestational weeks
Results of serial thyroid function tests of the 35 infants who were started on levothyroxine treatment during their neonatal intensive care unit admission. TFT, thyroid function test; Tx, levothyroxine treatment. Open boxes indicate infants who were not on levothyroxine treatment at the time of their thyroid function test. Solid boxes indicate infants who were on levothyroxine treatment at the time of their thyroid function test