However, in a later study on a smaller group (n = 17 in comparison to the previous n = 33) of younger individuals (19.82 ± 1.01 vs 35.00 ± 12.24 in the previous study), they observed an increase in serum BDNF protein concentration after 24 hours of DS, which was maintained after 36 hours [12]. The gene discussed is BDNF; the disease is Dravet syndrome.