function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brumley, Cameron', 1],
    ['Khruleva, Olga A. & Stekolshchikov, Andrey V.', 1],
    ['Mehrparvar, Mohsen & Rokni, Moein & Rakhshani, Ehsan', 1],
    ['Stekolshchikov, Andrey V. & Khruleva, Olga A.', 3],
    ['Stepanyan, Ilona & Barjadze, Shalva & Karagyan, Gayane', 1],
    ['Victor & Eastop, F. & Blackman, Roger L.', 6]
  ]);
  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);