function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fanelli, Elena & Vovlas, Alessio & Santoro, Simona', 1],
    ['Feng, Yaxing & Wang, Dong & Xiao, Dongxue & Pereira, Tiago José', 2],
    ['Ghaderi, Reza', 9],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 1],
    ['Kurdyukova, Elena A. & Kurdyukov, Alexey B.', 2],
    ['Rashidifard, Milad & Fourie, Hendrika & Daneel, Mieke Stefanie', 4],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 2],
    ['Tatli, Yiğit Ali & Bozbuğa, Refik & Özer, Göksel', 1],
    ['Wang, Honghong & Zhuo, Kan & Ye, Weimin & Zhang, Hongling', 1],
    ['Zeng, Yongsan & Ye, Weimin & Tredway, Lane & Martin, Samuel', 4],
    ['Zhao, Zeng Qi & Ho, Wellcome & Griffin, Ruth & Surrey, Michael', 1],
    ['Zhuo, Kan & Wang, Honghong & Zhang, Hongling & Liao, Jinling', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    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);