function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alekseev, Vitalii I.', 1],
    ['Alekseev, Vitalii I. & Bukejs, Andris', 2],
    ['Bukejs, Andris & Alekseev, Vitalii I. & Cooper, David M. L.', 3],
    ['Lord, Nathan P. & Leschen, Richard A. B.', 36],
    ['Porch, Nick & Smith, Tessa R.', 3],
    ['Porch, Nick & Smith, Tessa R. & Greig, Kelly', 6],
    ['Stefanelli, Silvia & Della Rocca, Francesca & Bogliani, Giuseppe', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=53)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);