function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alwin-Kownacka, Alicja & Szadziewski, Ryszard & Szwedo, Jacek', 2],
    ['Borkent, Art', 2],
    ['Coquillett, Daniel William', 3],
    ['Dominiak, Patrycja & Alwin, Alicja & Giłka, Wojciech', 1],
    ['El-Hawagry, Magdi S. & El-Azab, Salah El-Din A.', 1],
    ['Grogan, Willliam L. & Díaz, Florentina & Spinelli, Gustavo R.', 1],
    ['Hudson, George Vernon', 1],
    ['Loew, Hermann', 1],
    ['Meigen, Johann Wilhelm', 1],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 3],
    ['Spinelli, Gustavo & Wolff, Marta', 2],
    ['Spinelli, Gustavo R. & Ronderos, María M. & Ayala, Mahia M.', 1],
    ['Waltl, Joseph', 1],
    ['de Meijere, Johannes Cornelis Hendrik', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);