text: The most commonly used tests for dry eyes of Sjögren's<unk>  include Schirmer's test, ocular surface staining and tear break-up time.
option_0: Sjögren's syndrome other diagnostic studies
option_1: Systemic lupus erythematosus other diagnostic studies
option_2: Sjögren's syndrome differential diagnosis
option_3: Sjögren's syndrome risk factors
option_4: Sjögren's syndrome laboratory findings
option_5: Hashimoto's thyroiditis other diagnostic studies
option_6: DRESS syndrome physical examination
option_7: Sjögren's syndrome causes