function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bragina, T. M. & Dyachkov, Yu. V. & Farzalieva, G. Sh.', 2],
    ['Dyachkov, Yurii V. & Farzalieva, Gyulli Sh. & Tuf, Ivan H.', 9],
    ['Ma, Huiqin & Lu, Yanmin & Liu, Haipeng & Hou, Xiaojie', 1],
    ['Ma, Huiqin & Pei, Sujian & Hou, Xiaojie & Zhu, Tiegang', 3],
    ['Pei, Sujian & Ma, Huiqin & Lu, Yanmin & Liu, Haipeng', 1],
    ['Pei, Sujian & Ma, Huiqin & Zapparoli, Marzio & Zhu, Mingsheng', 4],
    ['Penghai Qiao & Wen Qin & Huiqin Ma & Tongzuo Zhang', 1],
    ['Qiao, Penghai & Qin, Wen & Ma, Huiqin & Su, Jianping', 2],
    ['Simaiakis, Stylianos Michail & Zapparoli, Marzio', 2],
    ['Zarei, Roghaieh & Rahimian, Hassan & Mirmonsef, Hassan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);