function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Borgmeier, T.', 2],
    ['Cedric A. Collingwood & Donat Agosti & Mostafa R. Sharaf', 1],
    ['DE ALBUQUERQUE, EMÍLIA ZOPPAS & PRADO, LÍVIA PIRES DO', 1],
    ['Forel, A.', 6],
    ['LaPolla, John S. & Schneider, Scott A.', 1],
    ['Martynov, Alexander V. & Radchenko, Alexander G.', 1],
    ['Mayr, G.', 1],
    ['Roger, J.', 2],
    ['Scupola, Antonio & Durante, Antonio & Giannuzzi, Francesco', 1],
    ['Ulysséa, Mônica Antunes & Prado, Lívia Pires do', 1],
    ['Wild, A. L.', 1],
    ['Wild, Alexander L.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);