function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Deepna Latha, K. P. & Haridev, P. & Anil Raj, K. N.', 1],
    ['Kaygusuz, Oğuzhan & Bandini, Ditte & Knudsen, Henning', 1],
    ['Naseer, Arooj & Jabeen, Sana & Ashfaq, Ammara & Akbar, Mahrukh', 2],
    ['Raghoonundon, Bhavesh & Vadthanarat, Santhiti & Hu, Yuwei', 1],
    ['Saba, Malka & Haelewaters, Danny & Pfister, Donald H.', 6],
    ['Yan, Ya-Ya & Zhang, Yi-Zhe & Vauras, Jukka & Zhao, Li-Na', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);