Which Texas hospitalization plan began in 1929 and guaranteed 21 days of coverage per year?

Which Texas hospitalization plan began in 1929 and guaranteed 21 days of coverage per year?

The Blue Cross story began in 1929 when Justin Ford Kimball, an official at Baylor University in Dallas, introduced a plan to guarantee school teachers 21 days of hospital care for $6 a year.

See also  How do I get free health insurance in CT?