How many entries for prothrombin time are there where platelet count is "decreased or unaffected"?
CREATE TABLE table_1555308_1 (prothrombin_time VARCHAR, platelet_count VARCHAR)
SELECT COUNT(prothrombin_time) FROM table_1555308_1 WHERE platelet_count = "Decreased or unaffected"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1555308_1 (prothrombin_time VARCHAR, platelet_count VARCHAR) Question: How many entries for prothrombin time are there where platelet count is "decreased or unaffected"? [/INST] SELECT COUNT(prothrombin_time) FROM table_1555308_1 WHERE platelet_count = "Decreased or unaffected" </s>