Figure 1. Flowchart of patient selection.

One patient was excluded because he was younger than 4 years (transplacental transmission of anti-N-methyl-d-aspartate receptor),³¹ and one patient was untraceable. Twenty-four patients participated in the follow-up study, of whom 2 are followed prospectively. Sixteen of the 22 participants completed the full neuropsychological assessment, 6 patients only completed the questionnaires, 3 visited our clinic, and 3 were contacted by phone because of geographical distance. NPT = neuropsychological testing.