function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Allgén, C. A.', 2],
    ['Besteiro, Celia & Ayora, Mario', 1],
    ['Chu, Mengdi & Hao, Yingdong & Huang, Mian', 4],
    ['Datta, Tridip Kumar & Al-Helal, Md. Abdullah', 3],
    ['Gusakov, Vladimir A. & Gagarin, Vladimir G.', 2],
    ['Holovachov, Oleksandr', 18],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 61],
    ['Liang, Huixin & Guo, Wen & Wang, Chunming', 4],
    ['Nara, Bezerra Tania & Ellen, Pape & Freija, Hauquier', 4],
    ['P. A. A. LOOF', 2],
    ['Poiras, Larisa', 2],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 15],
    ['Shi, Benze & Xu, Kuidong', 2],
    ['Venekey, Virag & Gheller, Paula F. & Kandratavicius, Noelia', 14],
    ['Árpád, Soós', 12],
    ['Other (9)', 9]
  ]);
  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);