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Even a tiny update like this makes the experience better for all of you.

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First of all, we've refined underlying connections in the database. Other updates contain:

• New items called “metasymptoms”. When patients describe their symptoms they frequently use phrases like “body aches” or “stomach ache on the right side”. That’s why we’re introducing metasymptoms – observations that are not precise enough to be treated as proper symptoms. Metasymptoms, like symptoms, are available via /search and /parse, so you don't need to change your code.
• Another rearrangement of renal conditions.

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Learn about changes in Abdominal pain and more.

• We've improved the structure of symptoms related to a duration of abdominal pain. Now, the model is better at dealing with 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). We’ve removed other four skin-related symptoms.

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Hello in 2018! Let’s kick off the new year sharing some news.

• We’ve rearranged renal conditions and created new item called Acute kidney injury.
• We’ve added new symptoms: Edema, hip joint and Joint pain, during hip movement. As a result, we have improved hip conditions.
• We continue to simplify and rephrase difficult questions.

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The biggest change in this update is Physical injury – the new master risk factor. What do you need to know about it?

• Physical injury does not influence conditions probability, but it can make the interview more accurate.
• We recommend using 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.

Other updates:

• We’ve added Tinea capitis condition together with its most typical symptom, Broken hair.
• We’ve replaced Red rings with light centers on skin with more specific Erythema migrans. As a result, we’ve created new parent symptom called Annular skin lesions.
• We continue to simplify symptoms related to dermatological changes.
• Tons of questions are now more user-friendly.

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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.