function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beasley, Clark W. & Miller, William R.', 1],
    ['Pilato, Giovanni & Kiosya, Yevgen & Lisi, Oscar', 2],
    ['Pilato, Giovanni & Lisi, Oscar', 1],
    ['Stec, Daniel & Tumanov, Denis V. & Kristensen, Reinhardt Møbjerg', 1],
    ['Zawierucha, Krzysztof & Kolicka, Małgorzata & Kaczmarek, Łukasz', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=6)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);