function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Armitage, Brian J. & Ríos González, Tomás A.', 5],
    ['Billingham, Zacariah D. & Theischinger, Gunther', 1],
    ['Driauach, Ouafaa & Belqat, Boutaina', 1],
    ['Ivkovic, Marija & Doric, Valentina & Baranov, Viktor', 1],
    ['Kolcsar, Levente-Peter & Oosterbroek, Pjotr', 3],
    ['Kolcsar, Levente-Peter & d\'Oliveira, Micha Camiel', 2],
    ['Men, Qiu-Lei & Yu, Dao-Ping', 1],
    ['Men, Qiulei & Lu, Zhiyong & Sheng, Pingping & Gui, Xiang', 1],
    ['Podenas, Sigitas & Park, Sun-Jae & Byun, Hye-Woo', 11],
    ['Podeniene, Virginija & Gelhaus, Jon K.', 9],
    ['Ribeiro, Guilherme C. & Santos, Daubian', 7],
    ['Ribeiro, Guilherme Cunha & Lamas, Carlos José Einicker', 2],
    ['Sandberg, John B. & Stewart, Kenneth W.', 1],
    ['Wiedeńska, Jolanta & Syratt, Maksymilian', 1],
    ['Zhang, Bing & Yang, Qicheng & Li, Yan & Yang, Ding', 5],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=52)',
    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);