function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bray, Rodney A.', 2],
    ['Cutmore, Scott C. & Bray, Rodney A. & Cribb, Thomas H.', 2],
    ['Dronen, Norman O. & Blend, Charles K. & Mohammed, Essa T.', 1],
    ['Fischthal, Jacob H.', 1],
    ['Hafeezullah, M. & Siddiqi, Ather H.', 2],
    ['Lunaschi, Lia I. & Álvarez, Victor Hugo Merlo', 2],
    ['Machida, Masaaki & Kuramochi, Toshiaki', 1],
    ['Margarita Ostrowski de Núñez & Nathalia J. Arredondo', 2],
    ['Nahhas, Fuad M. & Cable, Raymond M.', 1],
    ['Naidenova, N. N.', 2],
    ['Palombi, Arturo', 1],
    ['Shen, J. - w.', 1],
    ['Shen, J. - w. & Qiu, Zhaozhi', 1],
    ['Yamaguti, S.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);