"as in" or "as opposite to" in showing dissimilarity?

The usage of "as in" in sentences with negative meaning:

Home dialysis methods have come to the forefront among renal replacement therapies due to the minimal risk of infection transmission as they are performed in an isolated environment at home and due to the non-usage of immunosuppressive agents as in renal transplant patients.

OR

Home dialysis methods have come to the forefront among renal replacement therapies due to the minimal risk of infection transmission as they are performed in an isolated environment at home and due to the non-usage of immunosuppressive agents as opposite to the renal transplant patients.

FACTS:
1. Renal transplant patients use immunosuppressive agents.
2. Home dialysis methods does NOT use immunosuppressive agents.

Which one of the above two usages (as in OR as opposite to) is correct? Why?