Here is the text of a joint letter from 11 jailed Russian dissidents, issued to international leaders via Reuters. We, Russian political prisoners, appeal to all international leaders who care about the suffering of people for their beliefs. There are at least 10,000 of us - Russian political prisoners and Ukrainian civilian hostages. Political prisoners are, more often than others, held in harsher conditions and deprived of the opportunity for parole and legal relaxation of the detention regime. * We call for the immediate and unconditional release of sick political prisoners who are dying in Russian prisons.