function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ginsburg, I.', 2],
    ['Goode, G. B. & Bean, T. H.', 1],
    ['Kaup, Johann Jakob', 1],
    ['Lane, E. D. & Stewart, K. W.', 1],
    ['Marcia Salustiano de Castro & Ana Cristina Teixeira Bonecker', 2],
    ['Melo, Marcelo R. S. & Nunan, Gustavo W. A. & Braga, Adriana C.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);