function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Epler, John H.', 1],
    ['Ivkovic, Marija & Doric, Valentina & Baranov, Viktor', 1],
    ['Mukherjee, Bindarika & Mukherjee, Tuhar & Hazra, Niladri', 1],
    ['Saether, Ole A.', 11],
    ['Silva, Fabio Laurindo Da & Strixino, Susana Trivinho', 4],
    ['Tasdemir, Ayse & Akyildiz, Gurcay Kivanc', 4],
    ['Yan, Chuncai & Liu, Ting & Cao, Wei & Zhao, Guangjun', 11],
    ['Yan, Chuncai & Zhao, Guangjun & Liu, Ting & Guo, Qin', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);