function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barnes, Natalie & Ferrero, Timothy John', 2],
    ['Geng, C. X. & Hao, Y. D. & Huang, Y.', 2],
    ['Girgan, Chantelle & Marais, Mariette & Fourie, Hendrika', 2],
    ['Holovachov, Oleksandr', 20],
    ['Holovachov, Oleksandr & Boström, Sven', 42],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 4],
    ['Poiras, Larisa', 1],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 2],
    ['Tu, Nguyen Dinh & Thanh, Nguyen Vu & Hoang, Lai Phu', 2],
    ['Zhai, H. X. & Wang, C. M. & Huang, Y.', 3],
    ['Ürkmez, Derya & Brennan, Michael L.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=84)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);