Birth order, anxiety, and affiliation during a crisis.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001007:Anxiety; D001722:Birth Order; D005239:Fear; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D013312:Stress, Physiological