평소 두통, 심계항진, 발한, 창백, 공황발작, 불안 등의 증상은 없고 오래 운전하는 경우에만 뒷목이 뻣뻣한 정도였다.
There were no symptoms such as headache, palpitations, sweating, paleness, panic attacks, anxiety, etc. and only when he drove for a long time, his back neck was stiff.