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Mostly a maintanance release in which we've focused on refining underlying connections in our database. Other updates include:

• New items called metasymptoms that are not precise enough to be treated as proper symptoms. They correspond to phrases frequently used by patients to describe their casual observations (such as body aches or stomach ache on right side) and as such may be found via /search or /parse. Technically, we don't distinguish metasymptoms from proper symptoms so that you don't need to make any changes to your code.
• Further rearrangement of diagnosable renal conditions.

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This time we’d like to share important changes in Abdominal pain and more:

• We've improved the structure of symptoms related to abdominal pain duration. Now, the model better cope with the complexity of total duration and periods of pain. Besides, questions are simpler and more user-friendly.
• Abdominal pain has new child symptoms. They are related to the character of abdominal pain and its radiation to back.
• We’ve created Postpartum period as key risk factor for Postpartum depression.
• We've added Skin mass greater than 1 cm in diameter (parent symptom for three detailed types of lumps). Also, we’ve removed four skin-related symptoms.

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• We've added Acute kidney injury, as a part of a general rearrangement of renal conditions.
• Conditions related to the hip are improved by adding new symptoms Edema, hip joint and Joint pain, during hip movement.
• Another batch of questions have been simplified or rephrased.

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Check out latest changes in English model.

• We’re introducing Physical injury master risk-factor, which itself does not influence conditions probability, but can lead to more focused interview if applied properly.
• We recommend to use Physical injury as a potential trigger for subsequent questions about injury-related risk factors.
• If Physical injury is set to present, it prompts a multiple-choice question about underlying risk factors.
• If Physical injury is set to absent, all injury-related risk factors are automatically set to absent too.
• All risk factors related to physical injuries are available on the Diagnosis page.
• Tinea capitis condition has been added together with most typical symptom Broken hair.
• Red rings with light centers on skin has been transformed to more specific Erythema migrans. Consequently, parent symptom Annular skin lesions has been created.
• Over a dozen questions have been fixed towards more patient-friendly form.
• We continue to simplify symptoms regarding dermatological changes.

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We've refined medical concepts related to common injuries.

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We have introduced a few, but significant changes, including:

• We've added three new conditions, including Ruptured eardrum (together with Bleeding from ear as a typical symptom).
• We've removed Acute viral tonsillopharyngitis and Rotavirus infection. From now on, the API will return Acute pharyngitis and Gastroenteritis respectively.
• Now, you can handle the diffused abdominal pain with a new Abdominal pain, diffuse symptom.

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We've proofread, corrected and simplified the concepts' names and questions. Furthermore, new symptoms and conditions have been added. Finally, Dermatological changes, penis and Dermatological changes, vulva were merged into one: Dermatological changes, located in the genital area.

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We're exited to share with you hundreds of updates. Now, most of symptoms and many conditions are available in plain language (common_name field). In addition:

• We've added important valve disease.
• The endocrinological conditions were removed – because patients can't tell a difference between them.
• We've updated some dermatological symptoms. Now, patients should understand and distinguish them easily.
• We've removed abbreviations from the lab tests names.

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We focused on simplifying medical concepts and making question easier to understand.

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We've continued to refine the structure of our conditions, symptoms and risk factors. We've minimized a rate of over-confidence of rare conditions.

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We've added new conditions and removed a few overlapping and non-relevant diseases. The accuracy of the model has been re-tested and improved for the common primary care and emergency situations. We've continued refinements of the structure of symptoms and risk factors.

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We added question groups for pain intensity of head and abdomen. We also improved filtering of pre-menopausal symptoms and conditions. A few new conditions have been added and some questions rephrased.

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We're continously extending our model. The structure of conditions was cleaned up (e.g meningitis was removed because its subtypes – like viral meningitis – already exist). Besides, we added some conditions and improved the translations.

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Major update of the model. Introduced new conditions, symptoms and risk factors with a focus on acute medical problems. The structure of symptoms and relations has also been refined. Symptom groups has been cleaned up and reorganized.

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Many new relations have been added and refined in the underlying model. Please make sure you also read through the list of removed elements.