function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amato, J. F. R', 1],
    ['Bilqees, Fatima Mujib', 1],
    ['Dollfus, R. P.', 3],
    ['Gupta, P. C. & Singh, R. B.', 1],
    ['Korotaeva, V. D.', 1],
    ['Koval, V. P. & Zarichkova, D. B.', 1],
    ['Liu, Sheng-fa', 1],
    ['Lopes, Daniela A. & Mainenti, Adriana & Knoff, Marcelo', 1],
    ['Manter, Harold W.', 3],
    ['Shen, J. - w.', 3],
    ['Teixeira de Freitas, J. F. & Kohn, Anna', 1],
    ['Yamaguti, S.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);