However, ablative brain surgery was stopped in China in 2004 due to the related ethical controversy and possible side effects.
This practice and research on it raise scientific, clinical, and ethical issues such as additive side effects, interactions, threshold for adding second drug, appropriate target measures, and (for studies) timing of randomization.
Major barriers to the clinical use of gene therapy, however, include transfection efficiency, the creation of long-term effects, the difficulty of controlling cell proliferation, ectopic transfection, disease transmission, patient-specific dose responses, immune reactions against viral proteins, possible side effects, and ethical issues [ 87, 88].
45 Although recent guidelines from NICE 46 and ERS 13 recommend use of postbronchodilator spirometry to confirm the presence of airflow obstruction, debate continues over its use in epidemiological settings, with the arguments against including ethical issues such as possible side effects and contraindications.
An all-embracing information talk that incorporates potential side effects is an ethical imperative, as the ethically awkward aspect of SP performances is that although they are intended to protect "actual patients" from risk and suffering, they cannot avoid imposing a certain degree of risk and suffering on other people: the SPs themselves [ 68].
Moreover, any designed study in humans estimating vulnerability to side effects faces additional ethical constraints.
Even if the CSF is also relatively easy to access and it might be argued that immune responses in the CSF reflect the pathogenic processes in the CNS more closely, the risks of side effects and the ethical problems with exposing patients to repeated spinal taps emphasize the clinical and practical advantage of a test that can be performed on peripheral blood.
For this reason and for ethical reasons that apply to all medical procedures with potential side effects, participants must give their informed consent before screening [ 3, 4].
While outcomes are favorable, risks and side effects of transplantation and long-term immunosuppression pose a significant ethical dilemma.
On the other hand, it would be non-ethical to observe patients with poor glycemic control, because health-threatening systemic side effects developed.
