function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dollfus, R. P. & Williams, Modupe O.', 1],
    ['Liang, Chi & Ke, Xiaolin', 1],
    ['Moravec, František & Sey, Otto', 1],
    ['Rizvi, Anjum N. & Bursey, Charles R. & Bhutia, Pasang T.', 1],
    ['Tandon, Veena & Imkongwapang, R. & Prasad, Pamod Kumer', 1],
    ['Wang, P. - q.', 1],
    ['Zhang, T. - f. & Sha, G. - r.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=7)',
    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);