function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beck, L. & Woas, S.', 1],
    ['Beier, Max', 4],
    ['Edwin, Bedoya-Roqueme', 1],
    ['Harvey, Mark S.', 2],
    ['Hoff, C. Clayton', 1],
    ['Judson, Mark L. I.', 1],
    ['Lazzeroni, G.', 1],
    ['Mahnert, Volker', 4],
    ['Moritz, M.', 4],
    ['Reboleira, Ana Sofia P. S. & Pérez, Antonio José', 4],
    ['Romero-Ortiz, Catalina & García, Fabian & Villarreal, Eduardo', 1],
    ['Vachon, Max', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    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);