function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aistleitner, Eyjolf', 4],
    ['Ardila-Camacho, Adrian & Noriega, Jorge Ari', 12],
    ['Badano, Davide & Pantaleoni, Roberto Antonio', 22],
    ['ENGEL, MICHAEL S. & GRIMALDI, DAVID A.', 6],
    ['Hassan, Muhammad Asghar & Liu, Xingyue', 38],
    ['Hassan, Muhammad Asghar & Oswald, John D. & Zia, Ahmed', 32],
    ['Japaridze, Lasha-Giorgi & Makharadze, Giorgi', 4],
    ['Michel, Bruno', 21],
    ['Michel, Bruno & Mansell, Mervyn W.', 4],
    ['Monnerat, Christian & Abraham, Levente', 6],
    ['Pantaleoni, Roberto A. & Loru, Laura', 5],
    ['Walker, Francis', 6],
    ['Wang, Xinli & Sun, Mingxia & Liang, Aiping', 5],
    ['Yang, Ming xue & Wang, Xin li & Sun, Ming xia', 8],
    ['Zhang, Jie & Sun, Mingxia & Wang, Xinli', 11],
    ['Other (16)', 26]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=210)',
    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);