Table 1. Inclusion of cases for ultrasensitive sequencing.

Study	N patients (only blood)	N patients (only brain)	N patients (blood + brain)	Total N patients	Mean age at onset (range)	Mean age at death (range)
Rouen CNRMAJ, France	347	2*	2†	351	54.42 (44–65)	NA
MRC Brain Bank, UK	0	80	0	80	69.9 (53–82)‡	85 (71–99)
Netherlands Brain Bank	0	8	6	14	56.4 (48–63)§	66.9 (57–75)
Total	Total blood samples: 355 form 355 patients			445
	Total brain samples: 100 from 98 patients

Abbreviation: MRC, Medical Research Council.

^*One sample from cerebellum and one sample from frontal cortex for one patient, one sample from an unspecified region for the second patient.

^†One sample from cerebellum and one sample from frontal cortex in one patient, one sample from frontal cortex for the second patient.

^‡Among the 29/80 patients with available information.

^§Among the 12/14 patients with available information.