UK Anti-Doping has condemned hackers for leaking medical records after Laura Trott and Nicola Adams became the latest British athletes to have private information released into the public domain.
The Olympic gold medallists featured in the third batch of names whose 'therapeutic use exemptions' (TUEs), held on file by the World Anti-Doping Agency, have been published by cyber espionage group 'Fancy Bears'.
They were joined on a list released on Friday afternoon by swimmer Siobhan-Marie O'Connor and rower Olivia Carnegie-Brown, who both won silver for Team GB at Rio 2016.
There is no suggestion of any wrongdoing by any of the athletes.
UKAD chief executive Nicole Sapstead said: "We absolutely condemn the latest release of personal information pertaining to members of Team GB.
"It is causing unnecessary and unwarranted worry for the athletes affected. We continue to treat this matter with the utmost concern and seriousness, and we are in close contact with WADA.
"We have also been in contact with the four most recently affected athletes and have offered our support.
"We spent Thursday contacting Team GB athletes about the possibility of their TUE data being released and we will continue to keep our athletes and stakeholders apprised as more information becomes available.
"It is incomprehensible that someone would use athletes' personal information to try to undermine the global anti-doping system. These athletes have obtained TUEs through a robust and independent system.
"The use of TUEs is not a doping offence, and all of these athletes have legitimately applied for, and been granted, medical support within the anti-doping rules."
Cyclist Trott has spoken openly about her battle with asthma. Born a month prematurely suffering from a collapsed lung, she took up cycling as a youngster to help regulate her breathing.
The leaks by the hackers who are thought to be Russia-based show that the 24-year-old had TUEs for salmeterol and salbutamol - both commonly used in an inhaler - that expired on July 31, 2013.
"It's well known that Laura has suffered from asthma from an early age and inhalers are part of most asthmatics' lives," a spokesman for Trott told Press Association Sport.
"It's disappointing that her medical records have been put on the internet but asthma is something she's always been happy to discuss."
Boxer Adams' agent declined to comment when contacted.
The 33-year-old Adams has had TUEs for salbutamol, salmeterol and fluticasone propionate, all of which are used in the treatment of asthma.
Permission for their use was granted in 2007 and expired on December 31, 2009.
A fourth prohibited substance appears on Adams' WADA record in the form of methylprednisolone, an anti-inflammatory used to treat arthritis and bronchitis for which she was given retrospective approval for one-time emergency use.
O'Connor, who won Olympic silver in the 200m individual medley in Rio last month, has been granted use of prednisolone for five successive years, most recently in June.
Prednisolone - a steroid that can be used for chest complaints - and salbutamol also appear on the medical record of Carnegie-Brown, a silver medal winner in the women's eight at the recent Games.
Sir Bradley Wiggins and Chris Froome were among five British names whose records were leaked by hackers on Thursday, along with golfer Charley Hull, rower Sam Townsend and rugby sevens player Heather Fisher.
TUEs can be issued to athletes who have an illness or condition which requires the use of medication that is on WADA's prohibited list.
Canadian law professor and sports lawyer Dr Richard McLaren, who led an investigation into doping in Russia commissioned by the World Anti-Doping Agency, believes the TUE system may be open to exploitation in certain cases.
"One of the common TUEs is for ADHD (attention deficit hyperactivity disorder) medication - there may be abuse there," McLaren told the BBC World Service.
"That's one area that probably needs to be looked at - how frequently are certain medicines being used in particular sports?
"One would have to conduct investigations on specific sports as to whether or not too many TUEs are being used with respect to particular substances."