Britain's 400m world champion Christine Ohuruogu has defended her victory in the wake of her return from suspension for missing three drugs tests.
Ohuruogu led home a Great Britain one-two with Nicola Sanders
The 23-year-old Londoner, who only ended her 12-month ban three weeks ago, claimed gold in Osaka on Wednesday.
"I've explained myself to two panels and they've said there was nothing dubious," she told Radio 5live.
"I just forgot to let my whereabouts known. It was a simple act of forgetfulness and that's all it was."
Ohuruogu is allowed to compete at the World Championships under UK Athletics rules but banned from the Olympics by British Olympic Association regulations. She is to appeal against the BOA ban.
She admitted the furore surrounding her win had tainted her achievement in becoming Great Britain's first female track world champion in 14 years.
"I had (enjoyed it) at first but it is very difficult when you have all this negativity thrown in your face after you have worked extremely hard for something.
"You are damned if you do and damned if you don't. If I hadn't run well people would have questioned why I was brought out here, and when I do try to turn something around it is thrown in my face.
"I am just trying to block it out of my mind at the moment.
"I understand that people have questions, but if the report is there and says there is no evidence of anything dubious, I don't understand why people are still asking me to explain myself."
Asked if she had ever taken drugs, she said: "No, of course not. It's not something I would ever dream of doing. I believe my talent alone will get me to where I need to get to.
I didn't know until a week later that that I had a missed test
"If you deliberately take a substance in order to cheat you should be (banned for life)."
Ohuruogu also explained in more detail the events which led to her missed third test and subsequent ban.
"The system that we have, you have to put forward five slots per week of an hour each of where you are going to be.
"So, basically for the third test that I missed I had a slot for a certain venue that I am always training at but there was a sports (event) at the track.
"There was a last minute change of plan and we decided to go to another track and with the rushing around I didn't make that known to the anti-doping people.
We know that she was tested the week before and after she missed one of the tests - if she was taking anything it would not have left her system
Ex-sprinter Darren Campbell
"So when they turned up to the original track obviously I wasn't there.
"It wasn't as if I turned up, knew they were there and refused to take the test.
"I didn't know until a week later that I had a missed test. It was completely random. You never know when they are going to turn up."
Former British sprinter Darren Campbell has been vociferous critic of drug use in sport, but he expressed support for Ohuruogu's predicament.
"When the (drug testing) system came in it was not made completely clear exactly what and how the process worked," he said.
"On many occasions I have gone to the track in Cardiff and they have got a schools sports day on.
"I didn't know they were going to be there and unfortunately the last thing on your mind is that you have to ring the drug testers.
"If we go to the facts, we know that she was tested the week before and after she missed one of the tests.
"Of the little we do know about science, if she was taking anything it would not have left her system. The tests are on another level now. Finally they are now doing blood tests."