function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archibald, S. Bruce & Makarkin, Vladimir N.', 1],
    ['Aspoeck, Horst & Aspoeck, Ulrike', 2],
    ['Engel, Michael S.', 2],
    ['Hassan, Muhammad Asghar & Oswald, John D. & Zia, Ahmed', 3],
    ['Liu, Xingyue & Aspöck, Horst & Aspöck, Ulrike', 2],
    ['Liu, Xingyue & Aspöck, Horst & Yang, Ding & Aspöck, Ulrike', 11],
    ['Liu, Xingyue & Aspöck, Horst & Zhang, Weiwei & Aspöck, Ulrike', 4],
    ['Liu, Xingyue & Hajong, Sudhanya Ray', 2],
    ['Liu, Xingyue & Lyu, Yanan & Aspöck, Horst & Aspöck, Ulrike', 2],
    ['Makarkin, Vladimir N. & Archibald, S. Bruce', 2],
    ['Shen, Rongrong & Aspöck, Horst & Aspöck, Ulrike & Liu, Xingyue', 2],
    ['Shen, Rongrong & He, Yingnan & Pan, Zhaohui & Liu, Xingyue', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);