Which of the following statements about gene therapy are CORRECT?
- Affected individuals, but not their progeny, can be cured through germline gene therapy
- Affected individuals, as well as their progeny, can be cured through germline gene therapy
- Affected individuals, but not their progeny, can be cured through somatic gene therapy
- Affected individuals, as well as their progeny, can be cured through somatic gene therapy
- $P$ and $R$ only
- $P$ and $S$ only
- $Q$ and $R$ only
- $Q$ and $S$ only