function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arabuli, Lela & Murvanidze, Lali & Faltynkova, Anna', 3],
    ['Barker, Franklin D. & Covey, George W.', 1],
    ['Bennett, Harry J.', 2],
    ['Chandler, Asa C.', 1],
    ['Lenis, Carolina & Vélez, Imelda', 1],
    ['MacCallum, G. A.', 4],
    ['Odhner, T.', 1],
    ['Paredes-León, Ricardo & García-Prieto, Luis', 13],
    ['Tubangui, Marcos A.', 1],
    ['Yamaguti, S.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);