function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alekseev, Vitalii I. & Jäch, Manfred A.', 2],
    ['Bouchard, Patrice & Bousquet, Yves & Davies, Anthony E.', 1],
    ['Champion, George Charles', 1],
    ['Chatzimanolis, Stylianos & Cashion, Molly E. & Engel, Michael S.', 2],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 2],
    ['Hájek, Jiří', 1],
    ['Illiger, Johann Karl Wilhelm', 1],
    ['Lawrence, John F. & Slipinski, Adam', 2],
    ['Lewis, George', 4],
    ['Meurgey, François & Ramage, Thibault', 1],
    ['Motschulsky, Victor de', 1],
    ['Nardi, Gianluca & Bocci, Maura & Poggi, Roberto', 1],
    ['Peck, Stewart B.', 2],
    ['Peck, Stewart B. & Thomas, Michael C. & Robert H. Turnbow, Jr.', 1],
    ['Robert H. Turnbow, Jr. & Thomas, Michael C.', 1],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);