function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bolívar, Ignatio', 2],
    ['Chand, D. Suresh & Das, Swapan Kumar & Kumar, Hirdesh', 3],
    ['Felix, Rob P. W. H. & Massa, Bruno', 7],
    ['Fontana, Paolo & Buzzetti, Filippo Maria & Mariño-Pérez, Ricardo', 2],
    ['Ghahari, H. & Havaskary, M. & Tabari, M. & Ostovan, H.', 2],
    ['Gupta, Sunil Kumar & Chandra, Kailash & Yin, Hai-Xiang', 2],
    ['Hemp, Claudia', 2],
    ['Hollier, John', 12],
    ['Mao, Ben-Yong & Li, Miao', 4],
    ['Roy, Roger', 20],
    ['Sanabria-Urbán, Salomón & Song, Hojun & Oyama, Ken', 18],
    ['Tlili, Haithem & Abdellaoui, Khemais', 3],
    ['Usmani, Mohammad Kamil', 5],
    ['Usmani, Mohd. Kamil & Nayeem, Md. Rashid', 4],
    ['Yin, Xiang-Chu & Shi, Jian-Ping', 15],
    ['Other (16)', 18]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=119)',
    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);