function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fischthal, Jacob H. & Kuntz, Robert E', 1],
    ['Jagerskiold, L. A.', 2],
    ['Lunaschi, Lia I. & Álvarez, Victor Hugo Merlo', 4],
    ['Nicoll, W.', 3],
    ['Presswell, Bronwen & Blasco-Costa, Isabel & Kostadinova, Aneta', 2],
    ['Yamaguti, S. & Nisimura, Hisasi', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    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);