Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_204_597 ( id number, "main author" text, "no. of patients" number, "duration of follow-up years" number, "linearized rate of infection" text, "actuarial freedom from infective endocarditis" text )

### Question ###
what author had the least number of patients ?

### Accurate SQL ###

SELECT "main author" FROM table_204_597 ORDER BY "no. of patients" LIMIT 1