From 1910s to 2010s.
A lot are still in use and proven effective over time, such as topical retinoids from 1970s and oral retinoids in 1980s.
My favourite is 2000s' acne extraction and cortisone shots. What about you?
Telemedicine is not new. My very first telemedicine experience started in 2013 when I was still practising in government hospital. The servi...