function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barkalov, V. A. & Mutin, V. A.', 2],
    ['Dawah, Hassan A. & Abdullah, Mohammed A. & Ahmad, Syed Kamran', 13],
    ['El-Hawagry, Magdi S. & Gilbert, Francis', 8],
    ['Gilasian, Ebrahim & Steenis, Jeroen van', 23],
    ['Grkovic, Ana & Smit, John & Radenkovic, Snezana & Vujic, Ante', 5],
    ['Hassan, Muhammad Asghar & Shehzad, Anjum & Dyola, Urmila', 8],
    ['Heimburg, Helge & Doczkal, Dieter & Holzinger, Werner E.', 3],
    ['Kočić, Anja & Vujić, Ante & Tot, Tamara', 12],
    ['Lorenzo, Daniel & Ricarte, Antonio & Nedeljković, Zorica', 3],
    ['Meigen, Johann Wilhelm', 9],
    ['Mutin, V. A. & Barkalov, A. V.', 7],
    ['Ricarte, Antonio & Hauser, Martin & Kinnee, Scott', 3],
    ['Ricarte, Antonio & Nedeljković, Zorica & Rotheray, Graham E.', 8],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 20],
    ['Smit, John & Zeegers, Theo & Dorji, Phurpa', 4],
    ['Other (19)', 27]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=155)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);